After tacking both sides of the truss I re-inserted it into the jig. Laying a scrap piece of wood on the drill press table I then turn the jig, with the truss in it, upside down, clamp it to the table and then drill the holes.
Make sure the jig is square to the hole saw.
Make sure you use cutting fluid.
Cut reeeeeeeal slow. My lowest setting is something like 318 rpm.