Hey guys. Just thought I'd let you know, I found a sight at Brownell's. It's a Williams WGRS-TC. It's made for a Contender, came yesterday and when I unscrewed the existing aperture there was a nice 1/4 hole +/- looking at me. It screws on where the existing site sits so there is no machining to be done. Cost was just over $34.00, not bad. I hope to give it a try this weekend. Thanks all for the feedback. Peter aka pistolfan