ST 4000
Tom, I concur with what Dave says. And Dave that was a great price. I got mine online, the MKII wheel pilot for 425, no tax. Tom, MKII is the way to go. It is more powerful, and get this has a hole on the side where.. yep, you stick a hose in it to clean the drive! It is compatable with the ST4000+ control head, so I assume it will work with the ST4000 control head. Just a couple of gotcha's mounting it. The wheel is slightly larger, so your old motor holes dont line up. I cut the new holes and then got a 1/4 inch piece of starboard and overlaid it to clean up the new holes. And your wiring to the motor is gonna have to be spliced cause the plug to the MKII motor is slightly different. I think you will be happy with a MKII. Good luckCheers