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Also, Heres some Text from Northslope describing how he does 100 plates:
I made a stencil from plexiglass so I could remark it as I do the rough in grinding.
A nickel or something similar works for the profile of your stencil.
I mark it rough it in on a bench grinder, holding the plate with my hands to prevent it from being overheated, get it real close within a 1/32" of being finished. Then get the bigger gouge marks from the bench grinder out using a drum sander on a Dremel. Once satisfied I'll sand it with emery cloth (320 grit) then i'll move onto 600 wet dry sand paper. Once that is done then Dremel gets a felt polishing wheel with Simi-Chrome metal polish (any metal polish will work) till I can see my reflection. Basically the do's are make it shine. The reason is because you DO NOT want to wear your governor lever arm, I've ground customers plates that they tried to grind and they were just roughed in and not finished and the wear on the plate was terrible could only
imagine what the lever looked like! The don'ts are don't get the plate too hot during rough in, hence the reason why I hold mine un-gloved with my bare hands. Take your time enjoy self! You'll like the results 2-3 hours from start to finish on your first plate.
HTH, Jim