The cowl is glass. I'm not worried.

I haven't had a problem with the mount. I got it pretty tight and bent the clamp really good in the rear. I would think that if it would be a problem then we'd be hearing about it from others on the forums. Some folks prefer the mount. It's the first H9 metal mount I've used. It tends to turn the plane into a musical instrument - echoing the engine vibration.

I bought a GP mount but didn't use it because the pre-installed holes didn't line up. If I wasn't in such a hurry to get something besides the trainer in the air, I might have taken the time to install the GP mount. It would have taken a few ounces off the weight. I guess I still can do that as a way of taking off some weight and moving the CG back.

I did drill a couple more holes to allow access to the muffler screws. I was thinking of adding one more to get to the low-speed idle, but I removed the cowl to adjust that.

Great chatting with you, too.

-brad