brushless mammoth st help

[Finnster]

You need something called a PiStix adapter to use plane escs generally. The thr signals are different from car radios vs air.

But honestly, if this is your first BL, I would say not to try and go too cheap and make things way to complicated and possibly unreliable. Buy cheap=buy twice.

I highly recommend just getting a Castle 2200kv combo and running that on 4 to 6S. IDK how big/hvy the truck is, but if its really heavy you may want to use a Neu 1521 instead.
The 2200 should be fine tho. Best off is the great warrantee, powerful software, and awesome service. IDK where you live, but do you really want to send a $100 esc halfway around the world for service BC you bought some knockoff esc from China?

ESC brakes are great, plus you get reverse. Reverse is really nice to have. You can get mech brakes, Ive done that, but its not worth a lot of trouble, esp if you are just bashing about.

You don't need a 2spd. A center diff is nicer to have and a BL motor does not more gears to be fast. RCM's slipperential is really nice, plus it gives a little low end slip plus some protection to the drivetrain from the low end TQ an elec motor has. If you can swing this, I would. It should fit about anywhere a std CD does.