BK Warrior 20120

[Serum]

I meant that the 9920 is reliable allready, but if you choose to run a 7XL on 20 cells. the 12020 is more reliable. It depends on the current the motor takes. the 9920 allready is proven tough for the maxx, savage, revo etc but if you want an even hotter motor than for example the 8XL on 20 cells (the 9920 is good for this)

than you should get the 20120. The 9920 and 12020 are alike in programming and options in settings.