In looking at Sanborn's front feed, I see too many sharp turns and fittings that are too small. He 'might' have a generous supply going into feed line but the feed line itself is too small. He doesn't show his supply so I don't know what it is. The front feed on mine will come from the short 17/32" galley that feed the rear main....that's as generous as you can get without going to extremes. What I'm getting at is in addition to having to cut a hole in his block, he's probably feeding the front with less oil than I am.
I do believe in keeping oil runs as short as possible. Yet another reason I am trying to avoid a remote filter or external lines.
I haven't settled on filtration yet...I haven't looked into it fully. I looked and the PH6 filter appears to be a swimming pool filter(?). If it's too large, though, then it becomes one of many great ideas that fall by the wayside...if it doesn't fit 'under the hood' it doesn't make the cut.