This was inspired/remixed from: https://www.thingiverse.com/thing:5181752

Printing:
The models were designed to print without any supports. The files provided are already in the correct print orientation.

Assembly:
It prints in two parts and just fits together. I made the hole for the charging pad pretty tight to hold the pad in place. So you can't (well you can but it's difficult) slide the top onto the base while the pad is nested in the base. You just need to feed the pad through the top part, slide the top on, and then push the pad into place. Just look at the pictures.