Build the bike like this: 1)
This is so much more manageable. As the chassis assembly is more involved than it seems.
Make sure the chassis is DONE. Rolling around like a bike with no motor.
Every pro wrench evolves to this or a reasonable facsimile thereof.
To protect as much paint or powder from being burned away. Get a tube of tooth paste, in lieu of heat sink paste, apply 1/2“ away from weld area and that will do it. Mint flavor makes the shop smell good. 2)