When Cleaning out frozen water outta my resevoir I noticed what appears to be a set-screw on my hydraulic pump inside the resevoir. It must control the flow rate of the fluid, making plow movement faster? Has anyone tampered with this? I have a backup unit, so perhaps I'll try it on the backup and see if it makes the plow movement faster. I'll post a pic in a few. The screw is the shorter one, closest to elmo's hand next to the long shaft that goes into the starter like motor.