Here’s the way to ensure gap-free miter joints when you’re edge-banding plywood. Before you cut the trim board miters, tape 45-degree “fitting” boards to the plywood corners. Now you can cut the trim to fit, shaving off a little wood at a time until you reach perfection. Once you’ve glued on two opposing sides, fit and trim the other two pieces using the glued-on pieces as guides. Thanks to Tom Huttemier for this new angle on miter joint making.