Hi Jeff, I have fitted a couple of Powertorques to other bases, only one to a Rover base but it was an early one that had obviously had a short shaft Briggs so it was no problem height wise. You are right I have alloy Rover and Masport bases here that you can't give away. I have looked at fitting a Powertorque to one one day and was thinking of putting a 10 degree set in the blades so that the tip of the blade will be down to the correct height. Too busy at the moment fixing the Powertoques I have