This Billings model was probably one of the first R/C models I ever built the speed control is a Traxxas XL-1 2 Channel am Airtronics transmitter . I took it down to a pond at Confederation Park to test it with my girl friend turned it on but the rudder was hard over & I didn't see that the boat started going in a nice circle until it screwed itself under .I jumped in and there was only 3 feet of water & 4 feet of mud . My girlfriend ,now my wife thought I was crazy but after 42 years she still thinks I'm crazy . (ESC: Traxxass XL-1) (5/10)