LBD..... I've thought about it but heck!!... I don't have the equipment and wouldn't even know where to start. 😄
This would be a good start. (and quite a few on LJ that I still have to migrate across)... most if not all have instructions and a good selection were plagiarised from people using hand tools.
Burr puzzles are nothing more than a stack of finger joints and you've proved yourself a capable box builder,
If your first cut is too short... Take the second cut from the longer end... LBD