I have a HTB 290 with a CMB green head and have tried numerous setups but end up with close to the same result. The boat has a really good attitude at speed and enters the turns fairly well, but at #2 & 5 it starts to drift out (from lane 1 to 5 by the time its on the straight), but if i back out of it .........hook. i tried engine height, prop, angle, cg and turned down the servo throw. any input would be appreciated. sorry about the long post.