[fhhhstix]

I asked the same question Albert. With an excavator or a model with hyd steer cyl's as long as you are using the model you are using the pump. To me it is also redundant to varie the speed of the pump as the spool is a variable control if the speed controller is linear with the servo movement then at a low input with a heavy load in a bucket you would not have the psi for fine control when a higher psi is still needed. On my track loader I use an rc on-off switch to shut the pump off if i want to take a break. Just my thoughts.

Travis