I have a Firma 160a in my Outcast 8s, a Firma 150a in my Felony, a Firma 100a in my Vendetta although my Slash 4x4 Ultimate runs a HW Max 10 SCT, My XO-1 runs a Castle MMX8s and my Race buggy (Team Associated RC10 B74.1) runs a HW Xerun XR10 Justock G1 so my Horizon\Arrma vehicles run factory Spektrum ESC's and my Traxxas vehicles run aftermarket systems. Of course my race buggy runs an aftermarket competition grade system in it. I've had incredibly good luck with ESCs and Motors i only fried one when i accidentally soldered a connector on backwards and that was years ago. I also didn't know that thing about batteries i also run all aftermarket batteries from Amazon specials to SMC and Pro-Tek race packs.