RE: Goldberg Ultimate 10-300 build
Steve, I won't try to win you over (as far as the soft mounts). It's kind of like the "tastes great / less filling" debate. Every engine has different harmonics if you will - shake more/less at different rpms depending on prop, etc. I found that my Saito 1.50 with a 16x8 APC shook at idle, and by stiffening the grommets, it allowed it to absorb the vibrations without moving around as much. There was the test refered to (read it on Central Hobbies website) that tells about benefits of Chip Hyde soft mount. Interesting stuff.