Oh! I actually made a Linux version of this, so I have an idea of how it works! (it works with my mouse and it's a bit incomplete. I was actually planning to fix it up soon for all the sociopaths who game on Linux with mouse accel...)
What settings have you tried? I think you can match your tf2 accel pretty closely.
If you haven't tried them yet, these settings may work:
sens = 1
accel = 1.02 (or try .02)
sense cap, speed cap, or offset all set to 0
power = 2 (it subtracts 1 for some reason. Quake live does this too apparently, idk.)
pre/post scalars = 1
probably (?) no angle/angle snapping.