I decide to do something similar wireless!
the A and B button are click,
the D-pad is the scrollwheel
receiver is in the back

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That's awesome that you made it a reality! Love the scroll wheel... well, I love everything about it!
it can bend easily, it does not break
the PMMA is not as well because it does not twist and is very brittle
to put everything I use epoxy glue two components
for the finishing, I use polyester putty, primer and paint