Let me clarify that this is not a tutotial. All I wish is to share experience, both mine and yours. If you have any comments or if I make any error, feel free to respond and correct me.
You can drag your mouse over the pictures I post to read the description.
As you unwind the motor, you will find how "untidy" that the machine winding was. This results in loose winding and thus lowers the efficiency of the motor (having both a lower speed at all ranges and a shorter run-time).
TO BE CONTINUED... (Forgive me that I would like to do this bit by bit.)
These are the types of wire that I use to do the winding. They are 29#(the thickest I prefer), 30#, 31# and 32# (the thinnest I use, equals to those inside the kit motor) respectively from left to right. Each coil costs less than $100 but you'll become physically handicapped if you finish using the whole coil in a short time. I guess I can't possibly use up any one of them in my life-time.