Looking for a 21.5 in good working order. Preferably a Much More,Tekin or Fantom but if price is right open to anything really just wanna try out class eventually

Need advice on a servo to purchase.. I havent run rc in 7 yrs. the last time was on dirt and in SC 1/10 I used to run savox and spektrum servos I have no idea what i will need in a buggy with high traction carpet. My son will be running a Yokomo yz2 cal3 on a Sanwa mt44. Until we can upgrade he will be running a Tekin Pro esc and a 17.5 redline...its what we got I am looking to buy a Kyosho RB 6.6/7 or a Yokomo yz2 CA2/3 what ever i can afford. With same same n motor. i however will be running this on a Ko Proppo as thats what i got until i can upgrade radio. ive been looking at protech servos as they have good reviews on amain...but would like opinions and advice as I know the servo is important especially on such a technical track... Any advice is appreciated cheers

Looking for a Kyosho RB6.6 ($100) or yokomo yz-2 CA($150) i would consider a Cal 3 or RB7 if price was right(cheap lol) also looking for a Tekin Pro black or RSX. Open to options on esc as its been 7 years since ive been in a travk and that was dirt. I am out of the loop in what is new, best and needed... thnx