Your words ,
"as far as gas pressures for proper operation of the bolt, my first ar10 in factory configuration went back to armalite 2 times for that exact problem, they worked the right direction on it, but never fixed it. i finally made the gas block adjustable and now it not only cycles properly"
that sounds like a gun that doesn't run to me .
The answers you were given were exactly what you asked for , " i am trying to find out as much as i can about reliability, magazine issues and the like. i know it can be done, that they exist, i just dont want to build one and then find out that they have some kind of little quirk. " and when they didn't agree with what you thought you got defensive .
Comparing AR10's to AR15's is apples and oranges what works with one doesn't always transfer to the other system because of the exponentialy heavier bolt carrier on the 10's . Comparing a 9mm AR15 is also way out of the ballpark as it has a totally differant operating system than either rifle , being a straight blow back design .
Like I all ready said you got this figured out have fun with it .