hi tom,so sorry to hear that g/m has not responded to you.not only did they get back to me the same day but philip sent me a new controller the next day.
i got it yesterday and rigged up my bike and boy does it fly,really fly.ive been useing a powabyke for 7 yrs and this is so much better.
i under stand your frustration at no comback from g/m as I thought id get the same treatment according to the posts on this site but I was proved wrong.when I contacted g/m I was ultra polite in my email, not screaming and shouting at them.
i think there quality control leaves a lot to be desired as my wheel is a bit egg shaped but I will relace to to another better quality rim.
bearing im mind I only paid £170/$320 for it including delivery,and I paid £750(granted it was a full bike,but its the motor that makes an ebike) for the very heavy powabyke that crawls along at 12 mph, im very happy with it.
if I have to change the rim,tyre,rewire the loom and anything else it will still be worth it in money spent out compared to uk prices for other ebikes/kits
i will be making one for my wife when I get a low slung frame bike for her.