i put together a small trunk on wednesday (approx 22.5" x 19" x 17.5") out of 18mm birch. went together easily until the top piece which had a bow to it on one corner. normal hand pressure was enough to flatten it out. trunk assembled with 2" brads and glue, all butt joints.
i cut the top off (3") the next day and it no longer fits on the box properly. it is off by about 3/16", and if i line it up on the part it is off, it becomes off at the opposite corner.
t-square says the box is now a parallelogram and the lid is square. the box was square before i cut the top off, cutting it must have released some tension and skewed the box?
so far i cant think of any fix that doesn't lose real estate in the trunk opening (adding a brace of some sort).
what are some fixes i should look into?