Thanks again, Bill for taking the time and effort to report on this issue in such detail. It is greatly needed and much appreciated.I've heard that the HLAs can go bad, but I don't think that's it. These same HLAs are used in a lot of different engines. The rocker shafts are unique to the V2K, and I think the screen in the intake shaft is too restrictive and starves the top end of oil. That's where the 1mm hole comes in, as you said, for greater oil flow. This is all just my speculation, but it's backed up by quite a bit of "research" (poking around on the web machine for answers).
I've got about 250 miles on it since the operation and all is well. We'll see in 2K-3K more miles, but I'm hopeful.
The Lady ('01 Vulcan 1500 Classic) has a similar issue on start up especially if she sets for about a week. I have driven her like that (ever so softly) for several miles and it will eventually clear up. However, my imagination runs wild with all the potential damage it is doing to her. So now, I usually let her idle until the cooling fan kicks on then shut down for a few minutes and it clears up. I figured the oil was completely draining from the top end and causing a tappet to tick. The oil light goes off immediately after starting which puzzles me as to why it takes so long for the oil to get back up top.
So the best solution I have found so far is not to let her sit so long!