Thanks HarryS and Al Hicks for you advice/help. Got the KT36/48SVPR controller and KT LCD8H installed and running great! The settings took a bit of experimenting since the motor seems unknown. What a difference in performance! With the original LED display in PAS 1 there was no gradual start - it would want to go to top speed of that mode(10-13 mph). Now you can gradually accelerate or just mosey along at a much lower speed and still have assist. The switch buttons are larger than the original display and makes it easy for selecting PAS levels when riding for more/less assist. Liked it so much that I just ordered another for my wife's bike. I've included a picture that shows the settings that work with ecotric 20" fat tire/folder. Had fun in about 2" of snow today! Fun and fat tires handle it great!