559,
1) Is the left roll rate issue comparatively the same in hover vs 60 mph spray run vs normal level cruise >75 mph? Or just during 60 spray run?
2) Is the backpressure on cyclic the same for left and right inputs?
3) Is the cyclic force gradient/mag brake system still in stalled?
4) Has the T/R rigging been checked recently?
Three items stand out:
A) “…I will hit the left stop trying to bring it back to level.”
B) “…cyclic is sitting a little farther left than it should be…”
C) “…at about 60 I would say that I have a lot of right pedal in to keep the ball centered…”
A&B could be related but…in my opinion…you should not be hitting the stop with the maneuvering you describe. There are a list of possible causes for A&B, but it’s C that strikes me as odd. I would think if you needed to hold pedal it would be LEFT pedal at that speed/power. Unless the T/R is out of rig and/or there is an exterior aerodynamic force exceeding the torque effect of the M/R.
W1