Carey,

I completely rebuilt the head with all new parts and am using the Gamma 700mm blades.

It isn't any better with the shaking. 1500-1600 is ok but when I get up a little faster I can see the canopy shaking as well as the gear. The mainshaft is true and everything is balanced as I can get it. No more going out of track when adding collective and the machine climbs out like a rocket.

When in a hover at 1700 I still have a miss in the engine. It's just a twitch every second or so. I also see that in forward flight although not much when at full throttle. This is a Hanson engine, are the needle settings any different? I'm going to try a new plug and some new gas mixed 50:1 with Amsol this weekend.

I Love the machine and how it flies, it's a real powerhouse with those 700mm blades, but I need to get the engine sorted out.