This is just a simple remix of a case for the (very fun) Anbernic RG35XX that is adapted to the Honeycomb Wall ecosystem. Printed well for me with plate supports oriented how you would mount it to the wall. (Bottom on the bottom!)
My print profile includes the two hex inserts to attach it to the wall - if you want just the mount, grab the STL directly and print with standard 0.20mm profile (or strength profile if you're gonna be mean to it).