beware of goldenmotors...
azvinnie (my son-in-law)has bought hub motor kits from them...
3 at once for trike builds
2 out of three worked fine
the other has a problem that causes it to always 'fight itself' (trying to turn both directions at once), it is internal to the hub (not controller related)
they never answered repeated e-mails and killed my acct on their forum complaining about it
it is hanging on our garage wall as a 300$+ example to me and azvinnie NOT to always buy the cheapest stuff