Here's the great thing about woodworking... it really hasn't changed much over the last few decades, even centuries. Sure, there are new tools and technologies that make things come together faster, light-weight power tools that cause less fatigue, and safety improvement measures like that table saw that stops if you put your tongue on it. But the techniques are classic, and the purpose and design of hand tools are the same as they were for our grandparent's generation, and their grandparents before. All of which means - there's some staple, go-to techniques and joints and processes that every woodworker should know, and you don't have to make sure your sources are up-to-date before you seek out the best way to cut a mortise.
For the router you'll need a a 3/8" straight bit, an edge guide, 1/4"- and 1/8"-radius roundover bits, and a flush-trim bit with at least a 1-1/2" cutting length. Bits of this size are available only for a 1/2" collet. Some routers are capable of using multiple collet sizes. I was fool enough to buy a router that only had a 1/4" collet. More on that, later.
Regardless of which type of screw you use, you'll need to flip the panel and use a countersink drill to on all of the exit holes. Drilling MDF leaves bumps, the countersink bit will remove them, and will create a little bit of space for material drawn up by the screw from the second sheet of MDF. You want to remove anything that might keep the two panels from mating up flat. I set a block plane to a very shallow bite and ran it over what was left of the bumps and over the edges. The edges of MDF can be bulged by by sawing or just by handling, and you want to knock that down.
Cut the 6-1/2-in. x 3-in. lid from the leftover board, and slice the remaining piece into 1/4-in.-thick pieces for the sides and end of the box. Glue them around the plywood floor. Cut a rabbet on three sides of the lid so it fits snugly on the box and drill a 5/8-in. hole for a finger pull. Then just add a finish and you’ve got a beautiful, useful gift. If you don’t have time to make a gift this year, consider offering to do something for the person. You could offer to sharpen their knives! Here’s how.
Anyway, the reason I bring all this up is not to brag, but to alert you to a great deal. Recently, we had a chance to acquire the last print copies of these five books, which were sitting, overlooked, in a warehouse. The books mainly have black and white interiors and beautiful hand-drawn illustrations. And every one offers more than 300 pages of excellent advice on woodworking projects and techniques.
Begin by cutting off a 10-in. length of the board and setting it aside. Rip the remaining 38-in. board to 6 in. wide and cut five evenly spaced saw kerfs 5/8 in. deep along one face. Crosscut the slotted board into four 9-in. pieces and glue them into a block, being careful not to slop glue into the saw kerfs (you can clean them out with a knife before the glue dries). Saw a 15-degree angle on one end and screw the plywood piece under the angled end of the block.
Geometric shapes are made from straight or curved lines such as circles, squares and triangles. Their easy-to-recognize and often symmetrical patterns offer a sense of order, efficiency, strength, formality, but to some may be seen as uninteresting. Squares and rectangles are the predominant geometric shapes seen around us, not only in furniture, but in all areas of life. A circle has no beginning or ending, making it complete and inspiring thoughts of nature, perfection, unity, initiation and inclusion.