I have had the Rad City for about a year now and it has been great. I did the top speed adjustment about a month after I had it and that was great. The thing I wonder is often when I am riding now I will be at the 750 watts to get up to speed but as I pass 20 mph the wattage tapers off. Am I correct that at about 25 mph there just isn't enough voltage in the pack to push the motor any faster? Or is this a limitation of the stock controller? I am regularly riding about 24-25 mph and 100 or less watts in PAS 5.