M-head questions

M heads aren't that expensive to worry about trying this difficult repair. Yes,quills were lapped to fit their hole. I don't think it feasible to try doing that,either.

To grease M heads,a Bridgeport tech told me to remove the plug screw at the top. Screw in the threaded end of a tube of lithium grease,and squeeze out a teaspoon of grease. Then,screw the plug back in. This is valuable and hard to find information.
 
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