Rim cylinder holder
Rim cylinder holder to stop those rim cylinders jumping around while picking.
The screws may not go into the rim cylinder properly, possible causes could be:
- The threads are slightly dirty, check that the screw supplied with the cylinder set still works.
- The supplied screws are not the correct size.
In the case of B, see if the screws supplied with the cylinder will work as a replacement to the screws supplied in the kit.