Hi.
Yes, it would be possible to downgrade to 3.6 again.
High speed rolls are as straight as they come, no nose up, never. If your pitch management or flight attitude isn't right in the beginning, the heli either barrel-rolls or even gains speed
but stays on-line.
Differences in aileron and elevator rate are corrected using D/R in your radio. The rest is taken into account. There are different parameters for aileron and elevator, automatically. Optimization is done "on the fly", automatically.
Some parameters have been frozen (no longer visible and adjustable) since there's no real need to fine-tune OR the fine-tuning is done automatically, too. Feed forward is still part of it.
Go v4, you won't regret it
Regards
Eddi
Born to fly ...
forced to work.