I like the oil cup idea. But like you said before, I'll probably go with a 90 degree elbow and a straight oil cup to get it up a little higher. The OPDA sits at an angle and the oil cup will be pretty low (downhill!) of the bushing.
I'd think for anyone buying a new OPDA this is the way to go.
Kinda makes one think we have gone back to the old days when oil cups were pretty standard fare. LOL I had a couple Farmall H tractors that used a couple oil cups for the Generator. I may even get one of those old pump oil cans and wear an engineer hat when I pop the hood on the Jeep.
How about doing the mod to the OPDA as far as drilling the holes as everyone has done, but plug the hole where the grease zerk would fit and put the oil cup in where the grub screw would go. I'd think you would still retain the capacity of the resivoir but the oil cup would be towards the rear at a better angle. You'd probably be able to go with 1/8" fittings all the way through then.
2006 Solar Yellow Rubicon Unlimited
Jeep Club Member #1340
6 Speed, Hardtop
Mods done: Hurst tee handle, cheap hand throttle, Rokmen Merc front bumper, Warn 9.5 TI winch with 3/8" X 100 worth of Viking yellow rope, DPG OME Ultimate with JKS ACOS up front, Kilby Gas Tank Skid, Kilby Steering Box Skid, Jeep Medic Belly Up, Skidrow Engine Skid, Rockcrusher Diff Skid in the rear, Warn Diff cover in front, , AR Outlaw II's and MTR 12:50/15's, Homemade rear Bumper, Cheap Cobra CB, Puma OBA, Sirius Radio, Locker Defeat, Rockhard cage, Rockmen short corners, homemade tire swing/tailgate hinge affair, Airlift air bags on the rear- - - - - - and more to come!