Cheers guys, I've always had big super bikes and supermoto bikes, but do love scooters just to be different! As for your welding tube, just practice practice practice, wether it's tube, box, or sheet, it's all the same mate, make sure your steels are clean and rust free, and your mig is turned up enough? Practice on a piece, then cut through it so you can see how deep your weld has gone!
I need to take more pics, I'm useless with pictures, here's my engine mount which I had to offset the motor 30mm the centre the wheel again, I used 20mm box section, which also spaces it back 20mm so should all sit nice and neat when done

Also picked up my frame earlier from local sandblaster, so now just need to paint it!