Glad you got that problem resolved Todd. My experience has been that there is a significant draw down on the drill once the pump actually starts pumping. Enough so that I use my 1/2 drill motor instead of the lighter 3/8. Once the the pump is pumping I always give it a few minutes running time. At idle the distributor shaft is turning around 5 times every second and I don't think my big drill turns much faster than that so I am essentially getting idle pressure.

Chuck