Square Assembly Jig
Clamping up frames and small boxes can be a chore. Just holding things together while tightening the clamps is tough enough. But trying to keep everything square while doing it adds to the difficulty. Fortunately, there’s an easy answer to the problem.
An assembly jig, like the one shown in the photo below, keeps one corner square while you add the clamps. But what really makes this jig stand out is the simple addition of a sheet of graph paper on the bed of the jig. The graph paper allows you to check the squareness of the assembly on all four sides. To prevent glue from sticking to the jig, I covered the paper with a clear, plastic laminate.