Well all the knowledge and help on this site is great! BC rider; I think you are correct in that my site is too tight in the dovetail. It is a skinner sight and they seem come 'oversized' and I have already filed it down but will pay more attention to this. I have a fair bit of soldering experience and only farmed the above job out to a gunsmith as I lacked the correct solder and flux. I sure hope I can do a better job!!