These are the following and I quote from that thread
I stated that I had looked at the gear rack when placing my motor back on the VII after getting it back from the shop. It was found to be in great condition and the only thing wrong with it was it was full of saw dust.The first is the tendency of the speed control cam to melt under duress. That could have been cured with a switch to a cam made of aluminum or brass etc. instead of plastic.
The second is the plastic rack gear getting brittle and breaking. Again a change of material would have cured it.
I also stated that I did not see how the use of aluminum or Brass would help make it better because when i first looked at these gears or sheaves as they are called according to the parts list. I did not look at them very well obviously and I though they were individual fingers that were attached to a hub of some king that held the belt in place and were made of plastic because of a flexibility factor of some kind.
After looking at my parts book I now see this matter in a completely different light and can actually see how this could be done and have a plan to actually try and the part by casting it and making it out of aluminum that I will melt my self and poor into the cast.
As for the Speed Control Cam I have tried to look in the parts book for it and have not found it list as that. are you talking about the
I am assuming these are the two Sheaves that I am talking about and not the two that are actually mounted to the Electric motor shaft. Which i did not notice were made of plastic or metal.
