Re: 2 Holes/ 4 Holes...
My 22" E, 2 holes.
Both my enameled Syrians - 2 holes.
Engineer Syrain - 4 holes.
Modern - 1 hole! I never noticed this before - LOL!
Remarkably, I've not noticed a difference bwt my E rigs (new and past) and either of my twp types of syrians.