I have been switching to a triangular setup, downloaded firmware and groundcontrol 1.26 yesterday and ran into some snafus with the calibration. Are you saying above that I should have used version 1.25 instead?
I have a number of things that seem to go wrong, like the chain not releasing after tensioning, and then the kogs running in the wrong direction and things that feel a little odd. Please let me know, I might just try to switch to 1.25. (I was coming from 1.16.)
I have the original frame with V-style arms with an additional 2x4 strength support bar horizontal to ground, the flexi-cord chain tension strategy, chains run over the top of the gear kog.