Originally Posted by
caltek1
I fully endorse what Tony posted. I have tried water dipping etc and the increase in RPM was pitiful.
The best way is to buy a few and test, keep the good ones, (not give them to others,

) and ditch the rest.
The other telling factor is to have high voltage cells to power them.
My two bob's worth.
Later
Calvin
Hmmm... i thought water dipping is the best way to break-in the brushes? shouldn't it make a noticable difference?