I see your point now. I was "assuming" the 230mm was a good balance point, not tail heavy at all.
So based on your pics and your descriptions, you think the battery tray should be centered over the landing gear former?
I will look at the esc mount tonight. A little worried about the length of the mezon and it interferring with the batteries if mounted vertically. But will try it out.
What are the flying characteristics at your current balance point? How much elevator is required for inverted flight? How does it track on 45 up and downlines?
Thanks
Tony