Re: new to the forum newbie with a used SD4
I must admit that I just use an even .1 and .3 for layer heights, with accurately calibrated steps/mm...and things work out fine for me. My print accuracy is so good, that I print fuel injection parts for Italian sports cars (Alfa Romeo) with my SD4.
I'm not going to get into any verbal judo over the relative merits of the math. Much like the bed adhesion issue...everyone stick with what works for you. (Pun intended)
-Kevin