Thanks for the references guys, I'm following up on all of them. At some point I'll post more about my restoration, perhaps create a build thread. My bike is being delivered next Thursday and I plan on getting it up on the table and go through things to sort out what this project is going to cost me. It's a relatively low mile 2 owner bike with14,300 miles that looks to be all original. From the pictures, it looked great in 2006 after a partial cosmetic and mechanical restoration, and then rarely ridden and sadly sat uncovered in a garage since 2013. So a whole lot of dust, surface rust, and light pitting has set in everywhere. I'll never understand why people do this. The PO has no records and can't remember all what was done other than new pistons/rings. So I don't know whether the cam was replaced, values/seats were done, layshaft bearings, etc. Given it only had around 12K miles on it when they worked on it, not much may have been done, sort of a mystery why the pistons were replaced but I guess that's what you get with barn stuff. I'm shooting for a like new bike with sensible upgrades so my approach is to simply pull it all apart, inspect, clean, recoat, and fix/replace where needed. I ride all the bikes in my garage, so it has to be ready to go and dependable. I'm fresh off a 1978 Moto Guzzi Le Mans frame up restoration last winter that went way, way, over budget but I'm extremely happy with the result, it's a killer bike. Hopefully this Norton won't be like that however as my wife told me about her wedding ring "The value remains long after the price is forgotten". Cheers!