Today was the day of my first drive with the TRF421X. Temperatures was quite cold but lots of sun! Maybe not the best conditions with overall “low grip” for the new TRF421X. But overall I am pretty happy with its first 4 batteries. First half of the day I started with my old TRF421 and my latest setup there. Fastest lap was 18.975.
With my 421X later I achieved a 19.082.
The hard suspension arms are more direct in response. So if you approach the max grip peak and go slightly above (overdrive) the grip will tear off more instantly compared to the softer arms, which are move “forgiving”.

Enough talking – here is the video – uncut – no edits – just one of my practise sessions today!

Initial Setup (PDF), which still needs to be improved (easy to drive – but a bit too slow!)
… and here is the blank edited version of my V.1.1 TRF421X Setting Sheet!

Special thanks goes to Simon Truong for the superb DJI Mic and Christopher Frank for taking the Video!