Four machinists got involved in this collaboration at my shop. It was time to get those plates flat and certified, and known quantities. Randy Richard (RR in the Shop--YouTube), Mike Walton (Ulma Doctor on H-M), Ray "Razor Ray" Goff, and I. Five plates total. We had Standridge Granite from Southern California drop by on one of their road trips. If we had done this separately it would have cost each of us $175 mileage charge plus $165 minimum invoice charge. This way, my 18x24 plate cost me $60 for the work and $43.75 for my quarter share of the mileage charge. What would have cost me $340 doing it alone became $103.75 doing it as a group. That is less than 1/3 the cost of going it alone, and saves the cost of shipping it for calibration and back again, which is expensive and there is also a fair chance of the plate being damaged or ruined in transit. The plates are all now calibrated to AA standards, none of them have more than 40 millionths repeatability, and some are within 20 millionths. These techs are highly skilled, care about what they do, go way past the minimum requirements, have pride in their work, and are absolutely pleasant to deal with. Three techs came, and they were done and gone in less than an hour and a half, on to their next job. Getting together with the other machinists was also great fun, as usual.