Outcast battery which one

[slick]

which battery do i go with

 

[SrC]

That Spektrum servo at $224. Ouch.
https://www.primalrc.com/product-prpre010

$Smart Lipos$, or Smart anything..... Smart Stuff is Dumb.
Much Better options out there easily found.
Save your coin for that nice XLX2 motor combo and some other needed upgrades.
Enjoy your 8s build.

 

[PeighDay]

I would go with something like this instead for the servo.

https://www.radiocontrolpower.com/product-page/jx2070-hv-73kg

or this

https://www.rcjuice.com/servos/serv...-brutal-torque-large-scale-digital-servo.html

For batteries check out this thread

https://www.arrmaforum.com/threads/what-is-your-rc-lipo-of-choice-in-2022.49890/

Quite a few suggestions out there

 

[SrC]

And this one is 100kg.

https://www.primalrc.com/product-prpre011

I say you really need a 100KG minimum torque servo or stronger for the K8s line.
200KG+ is probably overkill though.
8s rigs running weight is 30+ pounds.