Jim Jakosh .... I made one and have to study it to get it apart. I'm not a puzzle guy. They drive me nuts like jig saw puzzles!!!!!!!!!
If its any what like the ones I published, the solution PDFs also include un-solve steps... saves breaking the box apart... re-glueing the box is a PITA>
If your first cut is too short... Take the second cut from the longer end... LBD