Haha well no the LHBS guy doesn't sell any gas, just empty cannisters if needed. He must have just been mistaken. I knew nitrogen didn't dissolve well, hence why it made sense to crank the regulator up to ~4x the psi, to make sure the same amount of CO2 was in there.
Then I realized I had a bad connection and was leaking a little from my nitro tank, and when I fixed that, it dawned on me that if I'm putting the same amount of CO2 in there and negligible amounts of N2 were making it into the liquid... then what the hell was happening here? Haha
I tried a little last night and it was still under carbed, so I took it off the nitro tank and connected to my normal CO2 tank. Will let you guys know how it goes
That begs the question... If I'm only using the nitro tank to push the beer out... That tank is gonna last a while, huh?