This part is optional, but very helpful! I will show how/where to cut holes for your micro USB charging port, power switch and L/R buttons. But if you'd like to make it a little more foolproof this guide helps a lot: snap it to the bottom of an altoids tin and mark exactly where you need to drill/file. Easy-peasy. :)
This is for the newest version of the 3d-printed parts,
which does not require removing the crystal from the USB sound card. On this version, the micro USB port is moved in my a few mm to make room for the new sound card position, and the L/R button guides are improved. If you need the older version, you can still get it here
Price is $5 + shipping/paypal fees.
More details and discussion in the forums
My mintyPi paypal buttons are setup to work as a shopping cart! If you are going to purchase multiple mintyPi items from me, you can add all of them to your cart before checking out and avoid duplicate shipping fees.