RE: G5 optix XR..
strutnbuck,
I sent a few emails to G5 telling them to install small brass lock washers under the screws after I broke one of myself. The lockwashers are cheap and they will do the trick. Of course, G5 responded saying that they are working on the problem. I guess a $30 fix was too easy. Eitherway, ever since I installed the lock washers I have not had any buzzing or issues on my G5.