Set the drill press height (platform height) to one place so that it never has to be changed.

Step 11 "Drill the Socket Tapers" uses the largest and longest (3/16) drill bit. If the height of the drilling platform is setup for this operation; various blocks of wood can be used in all the earlier drilling operations to bring the drill surface closer to the bit. I use a small block of 2x4, and a couple of plywood scraps.