DIY Rock Tumbler - Acrylic Pulleys

These are Acrylic Pulleys I made with lighrburn and cut with a 40W laser. no other cad system was used. I have designed the actual Tumbler using Fusion360 and cut with lightburn but i needed bigger and interchangeable pulleys so i made these in lightburn cause there is no better way to get tips and to learn tricks. the more you use a software the more you understand it and work faster (and wish for some simple cad tools to make our LB lives a bit easier and more intuitive).

I started by nesting all parts using DeepNest but ended up nesting it by myself cause i felt like i needed better solution to suit my needs - tighter, better fit to my scraps collected from factory bins, and grouped these cause i cut, test, then continue cutting.

started with DeepNest

Then redesigned the outer shell of the pulleys and then manually nested inside lightburn

All pieces

Gluing the outer parts of the pulleys together with temp (not needed) bolts to tighten the layers for better adhesion.

Test fit

Next would be gluing the pulleys cores together and assemble everything together.
More will follow. Stay tuned.

What am I missing? Why are you doing split halves on the pulleys instead of one piece. That would be significantly weaker?

And to be honest - I wanted to strengthen my lightburn design skills, and the allegory would be: