RE: SIG SE CG question
I beg to differ on that!! I flew mine for hundreds of flights with 2-56 tail braces. I also moved ele and rudder servos to the tail. The only thing I did to get a little more nose weight was to move the battery up to the front of the radio compartment.
Do a search on here and you will see that this plane can be flown with a pretty far aft CG.