The hacksaw will often damage the last thread when it cuts. Running a nut off the end will fix this. You'll have to run the nut all the way down from the other end. This doesn't take long, if you chuck up the rod in your drill and let it do the work. Hold the rod vertically, with the drill pointing down, and just hold on to the nut enough to keep it from spinning.
The top is supported by the top ends of the legs and the top sides of the top stretchers. Stand your legs on end on a flat surface (like my door) and see if they wobble. If you have an end that isn't quite stable, use it as a foot, where the leveler will make it's flaws unimportant. Check the top edge of each stretcher for straightness. If one has a bit of a bow, use it for a lower stretcher. It's less critical that the shelf be well supported along its length.

1. In this post, you kindly remind us not to make it too deep or worry too much about the height. I presume you still believe a bench cannot be too long or too heavy? I’m with you — just asking if that’s actually still your opinion, since the bench above appears to be yet another six footer. (If longer is better, why don’t you build an 8 or 10′ for your home shop?) TYIA – remember, I’ve bought all my lumber to start my new bench, but I haven’t milled anything yet, so you’re really helping in an immediate way here!

Glue up the trim on the end, first. Do a dry fit, first, then as you take it apart lay everything where you can easily reach it as you put it back together again, after adding the glue. To help keep the edge piece aligned, I clamped a pair of hardboard scraps at each end. I used the piece of doubled MDF I'd cut off the end as a cawl, to help spread the pressure of the clamps. Squeeze some glue into a small bowl, and use a disposable brush. As you clamp down, position the trim just a little bit proud of the top surface.
David Ellsworth has been refining his style for years and now, with his first book, you get to see exactly how the “grandfather” of turning does it. Offering more than just turning infor­mation, a number of chapters in this book discuss top­ics that non-turners will be interested in. Having said that, turning is the main focus here. Ellsworth speaks to what he knows best – an open bowl, a natural-edge bowl and the highlight of the book, a hollow vessel with an impossibly small opening. He also covers basics like sharpening, design, finishing and more. One chap­ter even details the stresses that turning puts on the human body and how to get the most from this overlooked “tool”. A crucial read for a wood-turner and an enlightening read for a woodworker. 
Permanent or Portable? This is a distinction that decides much about your bench choice: Is it to remain stationary or must it fold, roll, or otherwise make itself scarce between jobs? Large, heavy benches are more stable and, in general, more adaptable to different jobs (sometimes several at once). But the bigger the bench, the more hassle involved with stowing it.
“Introducing a new woodworking series in the tradition of Tage Frid…a series filled with essential information required by woodworkers today. For the first time ever, all the techniques and processes necessary to craft beautiful things from wood have been compiled into three comprehensive volumes: The Complete Illustrated Guides. Highly visual and written by woodworking’s finest craftsmen, these three titles — Furniture & Cabinet Construction, Shaping Wood, and Joinery — will establish a new standard for shop reference books.
Of all the machines in a workshop, we think two deserve their own books, not just because they possess the greatest potential, but when used incorrectly, are most likely to bite back. Bill Hylton and Fred Matlack’s Woodworking with the Router comes close to being the Router Bible. This tome provides an excellent overview of routers and bits while also explaining how to build and use jigs for router tables and handheld routing. Similarly, Paul Anthony’s Complete Illustrated Guide to Tablesaws gives entry-level and experienced woodworkers the information they need to safely use this workshop workhorse and accomplish more with their saws. Both books have excellent photos and great illustrations.

Workbenches have flat tops, though sometimes at the rear there is a cavity called a tool well that contains tools and components (and prevents them from falling off). One advantage of having the well set into the top of the bench is that, even with a variety of objects in the well, a large sheet of material can still be laid flat over the entire surface of the bench; the contents of the tool well offer no interference.

When the top is done, we want the edged MDF and the oak countertop to have exactly the same dimensions, and for their width to exactly match the width of the base.I could see three ways of doing this: 1, join the MDF to the countertop and use my belt sander to sand down their joined edges to match the base; 2, join the MDF to the countertop and use a hand plane to plane down their joined edges to match the base; or 3, use a flush-trim bit against a straight edge to route the MDF to the width of the base, then join the MDF to the countertop and use the flush-trim bit to route the countertop to match the MDF.
Once you start spreading glue, you have maybe five minutes to get the two panels mated, aligned, and clamped together. So make sure you have everything on-hand, and you're not gong to be interrupted. Start squeezing out the glue on one MDF panel, and spreading it around in a thin, even coating, making sure you leave no bare areas. Then do the same to the other MDF panel. Then pick up the bottom panel and flip it over onto the upper panel. Slide it around some to make sure the glue is spread evenly, then line up one corner and drive in a screw. Line up the opposite corner and drive in a screw there. Clamp all four corners to your flat surface, then start driving the rest of the screws, in a spiral pattern from the center.
I am new to woodworking. I'm learning as I go along, and I'm documenting as I learn, in the hope of being helpful to other novices. On the range from slap-dash to deliberate, my method is definitely on the deliberate side. If you have enough experience to be confident in using techniques that are more time-efficient, go for it. The techniques I'm using are those I thought least likely to go wrong, not those that would produce a product in the shortest time or at the lowest cost. You'll notice that I made a number of mistakes, spent considerable time on work I later determined to be unnecessary, and in a number of cases I used different techniques at the end than I did at the beginning. These are all the result of learning. I thought it would be better to demonstrate how I made errors, and how I corrected them, than to provide a set of instructions that presented the false impression that everything went together perfectly.
2 - use a plunge router with a bottom bearing cuter bit such as this from rockler: .... I thought to use the short one as I plunge it directly downward in the centre of the hole until the bearing reaches within the tabletop hole. I suppose one could use a long one, but the stubbiness seemed more practical (the big bearing ensured accuracy?)
Tapping the knowledge of dozens of top-shelf woodworkers, Scott Landis’s The Workbench Book, and Jim Tolpin’s The Toolbox Book are filled with inspirational photos and drawings that you can use to enhance your workbench and tool storage needs. John White’s Care and Repair of Shop Machines completes the workshop triumvirate. The author’s straightforward advice for repairing and setting machinery will help you make the most of every machine in your shop.

I mocked up the two scenarios, and determined that with the plate inside the stretcher the vise would have a reach of 8 inches, and with it outside the stretcher it would have a reach of 9 inches. I decided that 8 inches was enough, and that the extra inch wasn't worth the extra effort. With the end vise mounted like this, the right edge of the top would have no overhang.
First, cut one long edge. Second, cut a short edge, making sure it's square to the long edge you just cut. Clamp both pieces of the edging you'll be using along the long edge you've cut, and measure the width of the base plus 1/4-1/2", mark that, and then lay out a line through the mark that is square to the end you've cut, then cut along the line. Finally, cut the remaining short edge square to both long edges. (The length of the top doesn't need to precisely match anything, so we don't need to bother with clamping the trim before measuring.)
With the top laying on the floor, bottom side up, the next step is to flip the base upside down, and attach it to the top. I followed Asa Christiana's design, in using s-clips. When I stopped by my local Woodcraft, though, they only had two packages of ten, so I didn't use as many as I would have, otherwise. For the top I put four on each side and two on each end. For the shelf I put three on each side and two on each end. If it turns out that I need more, I can always add more.
Beyond the weight capacity, the Grizzly is also the largest table top on our list and in more ways than one. For a workspace, the Grizzly provides 5’ of length by 2 ½’ of width. There is not another table that really comes close to that size. Another size advantage of the Grizzly bench is the table top’s thickness. While the standard thickness of the table top for a quality woodworking bench is 1” with lesser models often offering only ¾” of thickness, the Grizzly provides a 1 ½” thick table top.