I'm doing a BB build for a guy (1st one in decades) & cant believe how restricted the coolling holes are on the 8519PT, the 3 slots at the top ain't going to cut it & very little openings on the outer edge. Cant drill em, I tried on the center piece that overhands into the valley just to see. The HF hole punches wont go thru the metal core. I'm going to a machine shop tomorrow & see what they have for a punch. Dog you got any info/tips/suggestions for me