About this 3D model
Fusion 360 file includedthis does not use any hardware, and may also work with arduino Mega and Arduino uno but i haven't tried it yet, if you try it leave a comment and i will update this. I did change this design slightly after I printed it, this was because the Arduino board would slide back when I tried to plug the cord into it. I measured the changes with a digital caliper and I assure you that everything will fit. the test fit part is for checking if your board will slide in correctly.