Geoffmaree--Thought we were hard done by here in British Columbia.We at least get
500W but it can only be a hub motor since you can't run the motor through the bike gears.
Going to buy one put together by a local E-bike shop.They can sell me one cheaper than I can put one together myself.They cost $1250 CDN.500W/36V Canadian made frame.
We have some pretty impressive hills around us so they build it with that motor and voltage.
There is a chap on Vancouver Island who is building an E-bike but it will be a couple of months be for it is available.He wants to test the heck out of them first.
Like your sticker idea.My luck is that copper would be a retired electrical engineer.
Steve.