I have the Jrco, Works well. I added a 12 volt spray kit to it, so I can spray weed control & fert at the same time. As far as the speed, I made stops for my lazer (dont have a pic and I cant really explain it but I took a piece of metal, cut a slot in the middle, drilled a hole in the mower, right in front of where the drive arms go in,and screwed in the piece.) they are adjustable to any speed. Dont know if this helps, but good luck anyway.