3.5" Touchscreen Support

This is based up on the design http://www.thingiverse.com/thing:1043239

I have modified it to fit my version of the 3.5" touchscreen. Main changes being creating channels to allow the components on the back of the touchscreen to clear the support.

These are the ones that I ordered from Aliexpress

https://www.aliexpress.com/item/2016-Original-3-5-LCD-TFT-Touch-Screen-Display-with-Acrylic-Case-Compatible-for-Raspberry-Pi/32701628698.html?spm=2114.13010608.0.0.imOYZU

I have tested it wi