THEMA:

Is your R6 light the version with heat shrink tubing? That receiver was meant for indoor use and has been discontinued.

As owner of a DC24 you probably can afford a new REX 6 receiver. Buy one and test your configuration to be sure that it works.

And search for "f4 betaflight jeti" on google

if you have a thermoretractile which would advise me for a racing drone and that is the smallest and smallest?