This is to replace the excellent (but fragile) acrylic laser cut case that came with the kit. (The cat did it...)
I love this clock, too bad Limor doesn't sell it anymore.
There are two models, a simple one (here) without a back, and a more complex one, v2, with a back that holds with two 2mm screws (here). This one has even more of the honeycomb structure.
Please upload a picture of your prints!
3 perimeters, 3 top, 3 bottom
Supports do not seem to make a difference.