I guess the amount of splits the air and material have to make would make a big difference on the fan's needs. I think I can run directly from the meter to a secondary distributor. It would'n have to be very tall either.

 Thanks for the information. Both the JD and Steiger have closed center, but I dont know if the Steiger has the high flow pump or not. Likely not as it is an old one, but the previous owner had it on air seeder duty.