My 1894 cp-357 XS peep sights are only 1/8" above the original open sights. I had to replace the front sight with the one provided by XS. No noticable difference in cheek placement. Faster and more accurate than buckhorns, tougher than a scope (less ugly too). On a previous levergun, a rossi '92, I had my local machinist drill and tap for lymans(I believe its the same for williams) and it was done quicly and cheaply. later on I dropped that rifle and it landed right on the lyman sight. It bent slightly, but didn't break. It just needed to be re-sighted. The williams sight is cast aluminum, and I think it would have broken had it taken that hit. Both of the side mount types have faster and easier adjustments than the top mount XS, good for different loads- I had my Lyman marked out for 38's and 357's, very precise and repeatable. I think you would be happy if you had it d&t'd. Then get a lyman or williams, they might even be lower than the XS. Good luck!