Elevator trim change with Dual Rates?

[peterhill]

Guys, just bought the Smart SX 1+3 Multiflight Plus set to while away the Covid hours

Everything's working well except for some strange behaviour with Elevator Trim when I change rates. At full rates the elevator neutral is up, and quite a lot. Trim adjustment on the SX is not sufficient to stop strong climbing at anything over half throttle. At low rates the elevator is neutral - checked this on the ground before take-off with FunCub XL. Flying is neutral too. Nice and stable.

One of the first things I did at unboxing was to upgrade the SX firmware to the last on the list on Launcher - 1.72.

Is there a bug in the update? Any other ideas?

Cheers, Peter"

[peterhill]

PS to earlier post... Reverted to all earlier Firmware updates with no change. Also tried external Rx5 and HS-65 servo. Centre-point of servo still moves on rates change. Help!