DenverJayhawk, I'm hesitant to offer you any useful advise on the off chance that you might be a Denver Broncos fan. I'm going to give you the benefit of the doubt in the hope that you have the good sense to revile the Broncos like all right thinking people should!

A slight click at the top of the stroke is normal as the connecting rod changes direction. This clicking/pinging effect should subside once the engine is thoroughly broken in. I also suspect the vibration that you're experiencing may also be due to insufficient break in/run time on a fairly new engine.

You might try balancing whatever spinner you're using with your propeller; an unbalanced spinner can cause just as much of a shake as an unbalanced propeller. You could also simply try to replace your spinner with a safety nut and see if that improves the low speed vibration.

I believe, however, you won't find any significant balance issues with your spinner, either. Your O.S. Max .95 AX most likely will require a couple of gallons of fuel to be run through it while flying to smooth out the vibration at idle speeds and to reduce/eliminate that click/ping sound you're getting at the top of the cylinder stroke. Fly the engine fast and not too rich and it should settle in nicely as you continue to fly it.

Alarming amounts of vibration is often reported with larger glow engines when the engine is new. There isn't anything about your description that indicates a problem other than an engine that needs more run time to finish breaking in.

Good luck and good flying!