Two things I never liked in my Kitfox - the Rotax 582 (which you have fixed) and the flaperons. My flaperons were wire locked off so that you couldn’t select them after I frightened myself fartless with them realising that you lose all roll control when selected. Yes, you could pick up the wing with the secondary effect of rudder, but not if you’re not expecting it. To be honest, it doesn’t really need flaperons anyway and so I just used them as slotted ailerons from then on and never had an issue.
I look forward to seeing G-BUZA flying about again. I sometimes wished I’d kept G-BUOL and put a better engine in it.