Starting with the stryfe and all its variants i hope it helps. Id also suggest that you get pusher motors with good torque.

Nerf Khaos Mod Issue Revs On 2s Lipo Wont On 3s Lipo Nerf
Nerf nemesis wiring diagram. Not currently accepting. D hope it helps sorry about forgetting the labels this timewonder how many comments i will get about it. Not currently accepting. Working on creating videos explaining the wiring of various electronic blasters. It greatly helps with motor braking and with this setup you may get control over runs where the pusher never stops with a low torque pusher. I hope it helps.
This is a guide on the wiring diagram of the full auto conveyor belt blasters. The wiring diagram looks right to me. There havent been too many so ill add mine to the list. Im assuming you are getting some sort of double pull switch for the selector which should work well. Stock internals on 3s. By fan request i give you the stampede.
Use high current lipo cells to power the nerf rival nemesis with stock switches in conjunction with a simple mosfet based circuit that requires minimal shell modification. Its time for an easy mosfet wiring guide. Ive mainly seen the use of high amperage micro switches in this community but as tech in blasters microcontrollers brushless motors continues to expand and the motor arms race delivering new high draw motors to the scene its time for another mosfet guide without confusing the.