Hello everyone,I have a question that somebody might be able to answer.I currently have a HHA Optimizer 5000 with the .029 pin ,what I would like to know is if this fiber optic is replaceable. I would like to replace the .029 with a .o19 I seem to get a halo effect with the bigger pin.It doesn't happen when I target shoot only when I draw on a deer.I drew on 7 deer this season and saw that halo on 5 of them, I think this might have cost me my biggest buck of the season,but thats another story. Any info would be great .Thanks a lot...Pete