I tried changing the trims and using the RC control from The Honey Badger which doesn't have this issue but the twitch persists. I've spoken to Garfie489 about this and he is OK with it so I guess I can live with it as is but that won't mean I won't try to get to the bottom of this.

With the time I've got left before the event, I think I'll be investing in making some alternate lifting arms to deal with the spinners (I have one idea in mind) and for the Nuts competition