My son and I have the popular williams peep, marble ramp, lyman globe, lee shaver insert set up. We shoot tc pro hunter fx 50 cal muzzleloaders. Wishing would have done a little more research but now we are 2 weeks out from elk season and can't get the sights to come up without running out of thread on our screws. Shimmed up my sons with 2 thin refrigerator magnets and 2 pop can shims and hes still 4" low at 13 yds. Im about 3" low same setup. BH209 powder and thor 300 grain bullets. Is there an easy/ reasonable fix out there?