I have been using Magic Pie 5 Golden Motor front motors for some time. In one of my bikes I recently had to change a burnt internal controller for a brand new one. It worked fine for a day as I'm used to but then suddenly the performance power decreased as if it was working at 250 Watts and not the 1000 Watts that they're set to. I changed it one more time for a brand new controller to only find the same issue within few minutes of using the bike. Now I'm afraid to buy any more controllers in case the same was to happen. The controllers still work but at a very low power capacity. Does anybody have any idea where the problem could be? Does anybody have specific knowledge in these motors? In the industry I work in there is a lot of work for somebody with skills in emotors, controllers, lithium batteries. Can you please help with some advice or leave your contact details? Thank You