I read the 1409 documentation before posting. That thing addresses ingame admin gravity, xadmin multipliers (ground speed/air speed) and mutators (lowgrav), I already have all those setup.
The default lowgrav mod is just a little too much like walking on the Moon, I'm guessing multistuff gravity is equivalent to 500 or lower, I'd prefer 800 to 900. I don't know if I can directly edit the .u file, but I'm considering changing the physical volume equation.
Maybe I missed something
Seems like the ini should have a gravity=int setting under one of the headers