[DoctorGlenn]

I know what you mean about the medium duty information. I haven't even been able to find out when everything went from hydraulic to air. A major issue for me is wanting to go dual circuit which can't be done with a single hydrovac unit. I'm going to call Hydratech today and talk to someone in tech support. It seems that the larger swept area and greater weight of our trucks *might* make a difference. If not, I guess I'll just look into using a standard vacuum booster on a dual circuit master cylinder.

Thanks!

- Glenn