I took a ride to a local gunsmith today - Bruce Chandler at Hemlock Gun Shop. I showed him the Pardini mount and the Truglo sight and described the problem I am having keeping it zeroed. He is going to work a little magic and straighten it out. Unfortunately, that means I am going to be one-gunning it tomorrow at South River. Some might consider a 4-hour round trip a waste of time to shoot one gun, but I need to get out on the range or I'll go nuts!