Maybe they removed the screen to get more consistent air flow through the AS opening. Does anyone know what the other thing with the o-ring does and why they would have closed it off?
i was thinking the same thing, looks like they just removed the screen, filled the threaded hole and smoothed the entire area out. the other hole is threaded for the bolt that holds the screen in place.
That is what I was thinking. I found out the name of the guy that did the mods, Sarge. But that is all I have, a name. I will try to get his contact info and see what else he did. Later,