muskrat you are crazier than dutch- if that is possible , i wasn't expecting that when I opened the link ..
I think I represent that.....
.......Suppose the engine has been standing for some time, does the oil within the crank sludge tube /chamber drain away?
(I would think it does to some degree depending on were the crank comes to rest)........
I've suggested before that as the oil feed holes are in the *sides* of the Big-end journals (ie; @ 90˚ to T/B-DC), if the throw is below horizontal, then at rest it should in theory hold a certain amount of oil....until it rolls up past horizontal and at rest, any oil in the crank would in theaory start to seep out the big-end feed holes, or back down to the T/S main bush, where it will seep out over time ....so best to leave at BDC if parked up for extended periods.....on the other hand....
.....
So, with regard to the Conrod hole, the way I see it, is the hole only coincides with the above mentioned journal-feed holes momentarily *at 90˚* before/after TDC ie- when the crank throw is horizontal either way, so a very short time to catch an extra shot of lube......so there's not a constant extra steam anyway...can't see any problem having the 'ole, and mine's still running fine after most days in 6 years
Fairly sure my Thunder Rods have the 'ole, and facing the flywheel (but not planning a search in the foreseeable future)- but may have a photo on an old camera....