RE: SIG SE CG question
My UCD flew great with an AFT CG as well as the 27% Extra but this SSE with an AFT CG flew worse than a wingless GeeBee LOL
Lots of these guys are flying the SSE for a second plane. The recommended CG is much more stable. Moving the CG back as I did proved to be less than comfortable, that's all.
I would say balance the SSE as per instructions for the first few flights then do as I did and start eperimenting.
Cheers