I agree Blue. My post was just aimed at clearing up the OP's questions, but yeah when it comes to tuning the rifle I mess with the gas first. Lots of ways to do that, an adjustable gas block may be the most common for now (and works well when done right) but is not the only way or necessarily the best.
I also stick with mostly carbine and H1 buffers (Plainsman - in this case we're talking about different weights of the same size carbine buffer, standard vs the first step heavier), except when using light weight carriers and reduced buffer weights. Tuning the gas system allows any of those setups to run fine.
