Cool design, man, and good looking parts too
Would be great if you could show how the parts are joined together and the rest of the little details.
Btw, no doubt you'll be fine with the 6mm, but are you sure the 3mm parts will be sturdy enough? unless these are relatively small pieces, acrylic of this thickness tends to bend rather easily if it's put under pressure...
Looking forward to seeing how this one progresses