Third, for a quick-&-dirty fix that used to be seen with Lyman 48s used on older 1903s and similar, simply file a tiny screwdriver slot in the broken end of your shaft. Seems that many owners of iron-sighted 1903s had a problem with the windage knob being inadvertently rotated by slidng into or out of the gun case or saddle scabbard, and so to prevent this they simply removed the knob, shortened the shaft (or not) and filed a slot for adjustment. Probably many of these short shafts were originally caused by accidental breakage, as yours was, but I've seen this alteration on many an older 1903 and I'm sure some were done deliberately.
A topic I would like to go into a little when I'm on the mend. I caught a bug and had to cancel Vegas. As I have time I'll post a couple pictures, then we can discuss the why-for of it. There is more to this than meets the eye.
