[Ema]

This is a quite common issue on all the Futaba handset that use the 3vc gimbal assembly, so:
- the FF3 (T3UCP)
- the 3VC (T3VC)
- the 3VCs (T3VCs)
- not all, but the newer 3GR
- the 4GRS

This behavior happens when a meccanical offset occurs between the plastic stick part that holds the potentiometer and the potentiometer shaft.

The 3VCs and the 4GRS have an special menu that performs a new transmitter calibration in order to fix this issue.

For all other transmitter listed the best advice I can give you is to send your radio to Ripmax for a factory recalibration.

Bye
Ema