Fidgety Ring w/ 3 tactile bands

My class and I came across a great idea on Thingiverse for a fidget ring:
http://www.thingiverse.com/thing:188275

We decided to try and design our own for students in our classroom. The mechanism for assembling ours is almost identical to the linked Thing, ours needs to be hammered together and is quite a tight fit (we were making them for High School students and wanted them to NEVER be able to come apart).

I don't know if this qualifies this as a remix then, but we never modified any f