I think I will just try to develop at 20 degs C every time, or at least darned cloe LOL! This is waaaay too complicated for me.
I am quite partial to Xtol mixed with rodinal at the moment so I dont suppose I am going to find any published figures for that! I know some love to be super accurate, but I have found a bit extra here, or a touch too little there has no real impact on my ability to make a really satisfying print. still, it is nice to be able to get things right, consistent etc.
A simple question (I hope): By compensating by +/- 10% for every degree either side of 20, is this too much or too little compensation for most developers?