does anyone know of a 2 speed trans that might work on the mayhem. i want a little more speed when i get it, but i want to be able to change it back. that way i can run it fast or make it single speed again and go off-road without the worries of it being too weak. by the way--- macs hobbies in t-town al. has rtr mayhem for 440 plus shipping. thats where im going.