I suffer from a disorder in which I am compelled to radius & blend any drilled, cast or bored opening into the port or passage on either side. The first rule of hydraulic engineering is "reduce pumping loss on the LP (low pressure, suction) side", which is where the pipe leading from the pick-up head transfers incoming oil to the gears.
Trust me: you will intuitively understand what I mean when you examine the parts. A 1/8" carbide bit in a Dremel will do this in a few minutes, finished with a fine abrasive bit or even a fine file and hand sanding.
You'll feel better!
