Attachment Mechanism - Work In Progress

I'm working on something new and could use your feedback!

This is a simplified 1 hr print of a special attachment mechanism important to the function of a new toy I am developing. The idea is a starting point for my 3d model, so I can develop the rest of it while I figure out the right tolerances for these pieces. From my experience, clips and sliding parts can produce very different results when people print my designs. If you have time to print a useless doodad I would appreciate some fee