This bracket makes the Lock Ultra stick to standard EU (NL) doors better by providing more surface area when using double-sided tape.

This STL is a follow up from my design for the Lock Pro, adjusting the size and adding an arm. With the arm designed to compensate the force from the spring in the lock that's pushing against the door when using my thumb lock adapter: https://thangs.com/designer/NdeRooij/3d-model/SwitchBot%20Lock%20Ultra%20EU%20Cilinder%20Thumb%20Lock%20Adapter-1353228

I've had this on my door for about 6 months now and it's been great. If I would reprint it, I would makje the arm about 2/3 mm closer to the lock though, just to make it a tighter fit. As you can see on the pictures there's some space between the arm and the lock battery door. In the future I might just print a small spacer to jam in-between. If so, I'll upload it as well.