Thus device works like a charm! My wife is super happy knowing this device will prevent her hands from cramping up. The print took about 28 minutes with PETG by Kingroon.
Printed well with PolyTerra PLA, but unfortunately broke when I tried to mount it on my V8.
It's also not eactly obvious how far up you need to push this onto that little ledge. Button accessibility also seems greatly reduced now.