Dave, mighty impressive. I guess I may have stirred the pot with my shooting the PBs in my 1:28 flinter huh? I believe we discussed this before. And before you go hacking at the front sight with a file, instead of putting the tip of the front sight level with the top of the notch on the rear, why don't you try using the buckhorn like a peep and center the top of the front sight in it. That will definately raise your POI and might allow you to use the 6 O'clock hold.
Hey, its worth a try.