Late model Gen. 1 VMaxes don't have a oil drain screw like the early Gen. 1. You leave the downtube top plug screwed-in so you can remove the oil damper rod retaining screw through the bottom of the slider. That's one place where an air tool is handy for breaking-loose the damper rod screw. I suppose a cordless impact tool could substitute for an air tool, but my old Ingersoll-Rand 231C 1/2" air impact and Saylor-Beall 80 gallon 240V upright make for an easy job of it.
Replacing fork seals, I always disassemble the fork completely and rinse it out with mineral spirits, and then use a bit of fork oil during assembly to ease the re-build. Think of it like pre-oiling parts of the reciprocating assembly or the cam & valve train on an engine re-build.