One of the things I found very important when rebuilding a motor is how hot it is when it runs. The hotter it becomes, the more easily it will be for the magnets to die out, resulting in slower spinning and getting even hotter. That is why I will do this.
Some people said that I was doing too much. They said this created a "leakage" in the power of the magnets. But provided I use the stronger thin silver magnets, I am never worried about that.
Not only can I learn about modifying motors, I can also sharpen my photo-taking skills. Now I know why people have 2 or 3 flash lights.
One thing I ask for:
"The motor should be cool enough so that I can keep my finger on it for very long (not just have a quick touch) immediately after running for a whole pack of battery."
I was asking whether the motor is for tamiya 4WD. I definitely know that tamiya won't produce gold magnets.
Actually, it took me only 15 minutes to wind the 48-turn. You wish to see that?
One of the conditions for a motor to run fast and efficiently is the position of the armature. It must be at the centre of the magnetic field to reduce friction. The picture shows a good example of an armature"floating" in the middle of the 2 bearings or bushings.