I bought a OOD thumbscrew for the stryfe and thought I'd try the worker ones out as well. Be warned that if you're using the normal stryfe battery door, you'll be fine. But if you're using a 3D printed door, you should probably go for the OOD thumbscrew as it's longer. I had to really force the screw to make contact with the bottom in order to get the screw to lock. Otherwise, great!