Christophe and Benoit had little t-tails mounted just behind the canopy. The SFG idea could be for the wings. Not sure the impact during a stall tuirn or snap though. It may be worth trying.

The Showtime I flew had a Saito 100 in it. Flew it again today and maybe 10 degrees on the ailerons rather than 11 degrees. They are sensitive.

The CG was positioned per the plans as a starting point. It felt about right. Just needed a little bit of down elevator when inverted.

Don