Servo tape the front of the battery to the lower chassis. If that is not enough, use strapping tape in addition. This will reduced flex in the chassis

Needed to change pinion, but decided not to until I got more confident...

Will try!
Thx robk

Why tamiya still keeps using T-bar design while no other brands use it ?
I see that TRF102 looks very different from the F104V2, as it has T-Bar and side dampening system like th older F104X1.
Then, no Pillow Ball Link Rear as the F104v2 was..
why Tamiya seems to go back towards the past ?

To provide more grip in low grip track conditions.

mmm that reminds me a bit on my F104X1, that I like so much.

Just might still be the car to beat

Just sayin.

T plates have a more progressive rate than a link/spring setup. It may be better for rubber tire which is much heavier than a foam tire.

Thanks for your nice opinions
Before or after I will buy another F1 over my "old" F104X1.
I was just watching WRC F-One or Xray X1, but I love Tamiyas, so I think a TRF102 would be a great option.
I do see that the front end is the standard F104 one, isn't it?
(sorry for my poor english, I am from Italy)

It is the standard F104 design but it is a new harder material

Great! Do you know the P/N please ?
(maybe I can assemble that on my 104X1)

F Parts - 19004373

Thanks

Just finished mine,

what rims do you use?