So what is preferred, drain while on the center stand or on the jiffy.
My vote is on the jiffy stand being the drain plug is then at the lowest part of the pan.
This may not be true for softails. The drain is on the right side and it would seem that having the bike upright would be better. I used to get a little more to drain if I stood it up straight. Now I use my new lift so no issue any more.