A 45 gas engine will vibrate more than a glow engine, if you think about how low you are now at tick over compared too a glow and that big piston going up and down unbalanced by anything else you will start to get the picture, as the revs increase the amplitude of the vibration goes up the scale the vibs are still there but at a higher frequency, just like a glow engine, there are lots of things you can do to dampen down the vibs on the engine, but that will start another disscusion on the vitues of Isolation mounts. Just keep on flying and running your engine in it will get better as it gets more miles in it.

Mike