I apologize to the web master for waisting space here. I think this is a valuable service you provide, but not one of the 26 responses addressed my question. I suppose the only people who know how to calibrate an OM1n are the professionals who market their skills at a price. This is just a hobby for me, I'm surprised there isn't another hobbyist with more experience than I have out there somewhere. No matter, perhaps I'll attempt it on my own. Thanks everyone.