So, I finally made the custom riser for my tang, tapped a new hole in the tang (on my Cabelas Sporterized Hawken .54) and installed my Lyman Peep 57SML on the tang and a new 17AEU front sight. The peep didn't quite fit over part of the stock, and the wood around the tang rose slightly higher than the tang itself, mandating a riser or modifications to my stock (which I preferred not to do). So, I made an aluminum riser, found a brass screw that would fit (since I don't know where to find a blued screw anywhere in normal land) and broke my tap after I finished threading my new tang hole. The front site came off easier than I thought it would (kind of scary easy) and now we're good to go. Elk beware (I hope). Now I've got to go practice.