Pretty simple: in eyes off mode, there's nothing governing the shot cycle. With eyes on, you should be shooting at a crawl since there are no eyes installed in the gun. Turn your eyes-off MROF down to a level that your loader is capable of feeding and you won't be as likely to chop balls.
Since you already have a board, you could talk to Bob Moon at www.fixmyangel.com
about having the gun milled and drilled for eyes. He takes on eye jobs on a case-by-case basis these days. Cost would be, IIRC, around 150 for the basic job or 250 for the EyeQ/Fly mod with the screw-down eye covers and eye straps.