Welcome to the forum!
Have you considered putting a second drain port in the oil pan? If it were me, I would consider pulling the oil pan and having a 1/2" fpt fitting added, maybe to the bottom of the sump. Might be worth talking to Bob Smith at American Diesel about it.
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters