RE: Going lean at high 'G'.
bob27s and daven, that's something I hadn't considered. A bladder tank! Option 4/? My friend Iskander uses them but I thought it would not solve the high 'G' problem. Bob, I'm a little bit proud of this plane (it's scratch built and modified, not kit) and I've been carefull to make sure everything is sweet. Also, this is my first speed model so I expected the unexpected. During the early flights I didn't push it and had no problems, but now I'm getting the hang of it I get this leaning whenever I pull hard on elevator. Going lean towards empty is not a biggy, but the high 'G' issue is much more significant. I've noted your suggestions 1) to 5) and all is cool, just one thing. I run an APC 10 x 8, and I have no issues at all. Haven't tached it though. It unloads coming out of a shallow dive, otherwise sounds great. I have a 10 x 7 on hand, worth a try?
If you guys can confirm a bubbleless tank will solve the high 'G' problem I'll try to get one in there. Thanks for the advice.
Cheers from the Barfly.