Thanks Nitro, well still inching forward…

The got the front sight on. Superglued it first to check zero (with the Lyman 57 mounted and set to centre), then scribed it. Was slightly apprehensive about taking the oxy to my nicely finished parts (only other torch is a dirty old Kero pressure job). So practiced on a dummy sight and ancient 303 barrel that lives in my truck toolbox as a binder ratchet handle until was satisfied I had it sorted.

Then clamped with an old earth clamp, masked the area with 2b pencil, tinned the sight with hi-force 44, drilled a few wells to hold more solder, fluxed the barrel and sweated it on. Reckon I got a pretty good joint. Clean up was a bit slower but it’s fairly clear now after making a brass angle chisel from a gate valve shaft. Working on the rear sight now

Caliber mark came out well too