Alan, I’m m4a3shermans’s brother. This wasn’t my first rodeo. I have worked as a machinist and gun smith. I have all of Peter Laidler‘s articles printed out and bound, have for years. Also have a copy of Canadian Ordnance Corps, Extracts from Instructions for Armourers I got from Brian Dick at BDL Ltd, many years ago. I didn’t just grab the first bolt that fell to hand. I had a half dozen bolt bodys and eight bolt heads to choose from for the best fit. Both lugs were checked for proper engagement before I put the first bolt head on. Bolt head fully tightened clocks past at about 8°. Bolt closes on a British Military Spec Go Gauge, does not close on a British Military Spec No Go Gauge. I have collected Enfield Rifles, parts, Armours tools, gauges, related accoutrement and worked with Enfields for about 32 years now. In an endeavor to learn as much as I could, about twenty years ago, I built a SMLE Mk.III* using a stripped action body and mostly NOS components. Getting the NOS forestock properly fitted sure was a learning experience! I do appreciate your concern as this is different than bolting an AR15 together, and people do need to be aware that this takes more work, care and attention to detail to be properly set up and safe.