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I hope these links help you with your calibrations.
DKC850 Maintenance Manual
https://www.dropbox.com/s/6df1hkgbk3hlxnu/DKC-850%20Maintenance%20Handbook.pdf?dl=0
Mark III Maintenance Handbook
https://www.dropbox.com/s/18amqsiu9lp9l4g/MARKIII%20GP%20SMMHB18.pdf?dl=0