Howdy! I have a P-120 that I mounted on a test stand using a Kangaroo mount. While running the engine up, I noticed that the engine itself would move forward slightly within the mount, no more than maybe 1/2 inch or so. As the engine budged forward, the glowplug pushed the forward section of the mount forward, as shown by the red arrow in the attached picture. I took the engine out and re-mounted it again, making sure it was mounted as tightly as possible, gave it another test run, and the same thing happened. At high power settings the engine edges forward slightly inside the mount. I'm not sure if this is normal or not, just wanted to check.