I have the four holes. The tire shop where I got new back tires has only one guy in their gang that has small enough hands to get his in there. (I don't know if all tire shops make sure they have at least one guy who can do that--or hire women to do it)
The manager said they hate MHs because of the shiny wheel cover on the back with the holes that are too small. Of course "they" made it so the shiny cover uses the same lugs as the actual wheels, so you can't just remove the shiny cover. Those wheel lugs are no fun.
Another time, I had an extension with a crack in it and the inner tire went flat. What a time that was. I found out all about dealing with MH duallies with a flat up close and personal.
Phooey on that. :(