are there instructions available to assemble the dice tower.

Thank you @peter-erwig for posting a print file for this. I attempted to print this before there was a proper print profile and I ended up with too much support generation. Printed in Mika 3D dual silk PLA red-black. Most of the print came out very nice. Had to reprint the handle due to bed adhesion on the right end, but printed fine the second time. Assembly was difficult due to lack of instructions, but I was able to follow @D3nn1s ‘s images enough to get it right. 20mm screw may need a 24mm.

Looks amazing. Good detail. Solid model. Totally unusable. To get the gap open enough to drop the dice, you have to push it down, which jams the whole thing up and breaks the pin to raise and lower the door. If used with just the handles, the opening is 1.25 cm, which is too small for anything more than mini travel dice. When forced open, it has a 2cm opening. Needs a redesign on that trap door mechanism. Without the trap door it does okay, but the drawbridge won't be attached. It is an all or nothing design.