Hi!
Agree with Minnflyer...all you need is your fingertips to balance an airplane.
This has worked for me for 30 years, on all types of airplanes. Don't be fooled to get a lot of gadgets!![>:].
Why not mount the OS LA instead !! Better newcomer engine than the Super Tigre .40
Just put an 11x5-11x6 APC prop on and enyoy.
second alternative is to mount the batteries further back. But spreading weight is not so good.
I would go with the OS LA .40!
Regards!
Jan K
Sweden