Thanks Tim. Read Koefeld's instructions .... way past my skill set. Will have to write JJP to see if he will make one and what he would charge, ouch. Rifle is a double 9.3x74R over 20, stays under 3" for 8 shots at 100 from both barrels, from rest with the sights smoked and using a Merit disc on my shooting glasses, factory 286 grains. Well worth peeping. On a rifle with substantial recoil a toplever peep is preferable to one on the tang.