I modeled this adapter on the Sakata roll which in my experience is the best roll for the AMS. It has the same roll lip width dimension. I tried to weight it down with disecant, but it was not enough. This version with AA batteries as functioned flawlessly so far, even with just 1 battery in the center!

This is a functionnal print, so I did it in Extra Draft with nothing fancy.

The male portion is self centered, so always insert this side first to center the roll on it and then screw the female adapter.

The batteries cap for the holder is a simple fit by pressure. So really easy to press in and later pry out if you want to remove batteries, etc.

I hope this will help you as it's helping me!