E-bike core hub motor repair

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1. This is amazing work, I have the same core open and I have no way of finding out how to replace the hall sensors when the wires are routed under the motor windings. Would you be able to do a little more (beginner level) explanation of how that can be done it it was part of your rewire job? Thank you, your work is impressive.
2. hhhheeeeee
3. Hi, I have new 250w geared motor and sine wave cotroller and it makes a lot of noise when running. Runs for about 5sec. Then turn off and when I relase the throttle and turn again it work for 5 sec.
4. Hiya I have a xingling 1500w 48v electric scooter/moped. And my transmitter/speed controller has blown. Do you know off we're I can buy a new one please? I'm from the UK. It's doing my head in not having my bike :(. So if you to wonderful gentlemen could possible point me in the right direction. I'd be eternally grateful :)))) Thank You in advance. 
5. Is this a brushless motor?