The simple Reba set-up is: sag it one inch or so with air in the positive chamber only. Check the positive psi at proper sag and add air in the negative chamber to 10 psi LESS than the positive value. If you go too close to equal +\- pressure the forks travel and ride height is reduced - you can actually see the fork suck down. This seems to be the most agreed Reba dual-air method. With a rider/gear weight of 185, I use 70 positive / 60 negative. I've used other settings, but come back to this base-line as the all-around best. On the compression/rebound/motion control side: one turn of rebound, full compression with pop-lock depressed and motion control knob at 1 1/2 turns. This allows for a nice firm pedal-platform. Use +\- motion control to set the threshold for transition to "active". Full + on the motion control is "locked out." Enjoy your new fork.
that is fast rebound...I know the guy from the shop said that Gregg had a super fast rebound setting on his too...and if you 2 are running the same.
"The rebound damping is the speed at which the front wheel returns to the ground. Rebound is not only responsible for straight line handling but also is the energy the holds your front wheel in a corner.
Out on the track, find a good corner, preferably a short sweeper. The front forks compress to set up for a turn (providing you ride correctly and use your front brake.) The speed that the forks rebound is the energy that pushes your front end into the ground. If the forks are allowed to rebound too quickly, the energy will be used up to early and the front wheel will wash to the outside. If the forks rebound too slowly, the front end will tuck under and turn too soon to the inside. Adjust accordingly.
With the forks handling well in corners, go on to rougher sections of the track. The fork action should be smooth and the wheel should return to the ground quickly. It should not bounce off jumps or deflect off berms."