Two things:

My century PG2000IIR gyro is not working. I still have tail control with the servo, the light is on but it doesn't respond to movement. Nothing has changed other than lost teeth on the main gear on my nexus which caused the tail do some serious dancing. This has been fixed and now the gyro is not working. Changing the gain has no effect, am I missing something?

Secondly, those plastic screwdrivers for adjusting the gyro's....why not metal? Is this to prevent over "tightening" or is this an electrical issue?
Would using a metal screwdriver cause the above to happen?

I'm going to install a GY401 and don't want a repeat with this gyro!