I've often stated boxes are boxes and I have gradually morphed into a beligerant, "MDF, laser cut" boxing beast overnight. In the past, my boxing gloves included these in the padding, however, the creations possible were governed by the length of the 3mm (1/8") drill bit... and I've busted a few in the past.
This concept is just brilliant... why didn't you post this 5 years ago? Thanks for sharing and thanks for the SU model... I run 2018, but at least I can download the Collada format.
If your first cut is too short... Take the second cut from the longer end... LBD