Tablet/phone folio mini usb keyboard replacement shell

Ever get one of those cheap tablet cases with the built in mini usb keyboard and have it not fit, or fall apart?

Here's a shell that will let you use the keyboard without the folding case. Meant for a keyboard with a footprint of 20.5 x 8.25 cm.

Has full piece and a spit version for smaller printers of at least 12x12cm.

Pictures are of a "proto" version. The fit was pretty tight, so I expanded everything 1mm in each direction. I hope that's enough cuz I don't want to print a second o