Good morning folks. I'm stuck here in St Louis, TDY, awaiting the inevitable snow storm and thought I'd peck out a note. I have an Armstrong receiver sight that I have had mounted on my MKI Martini barreled for 45-70. It's been on the rifle for nearly 40 years, is as nice as most of the Lyman 48s I have had, and is constructed similarly. As fate would have it, the Martini fell out of the rifle rack the other day and broke the windage shaft where it enters the adjustment knob. I have seen replacement shafts for sale on eBay for Lymans but Armstrong parts, as well as complete sights, do not come up very often. It appears to be a straight foward job for a small lathe but I do not have the equipment at the moment. Does anyone have a source for repairing these receiver sights? Thanks guys. Terry