My buddy traded his velineon motor for a castle 5700 kv motor for his slash 4x4........b4 asking me. I told him to trade the guy back but the dude wont. Anyways he found a guy with a Reedy 3300kv motor and the esc and I dont know much about it besides it came out of a sc10 so will it work with the slash 4x4 or should he just get a velineon 3500.....? he has the vxl3s esc still. I told him to just go get the castle 3800 MMP like me. lol