I agree----you seem to have done your home---work. I read you are getting the Brinsea and hope that helps a lot. For your incubator now---keep your eye open for containers that you can stick in the bottom for more water surface or little single trays like you put spoons/forks in or similar that you can set on top of the wire after you take the turner out----maybe around the edge. That will help a lot with the humidity.
I agree some incubator brands seem to hatch better than others and "I" try so hard to help anyway I can with info---hoping a person can have a better hatch next time around----Being Honest I wish EVERYONE could hatch like I do----I started out with bad hatches in the Styrofoam, figured out somethings I was doing wrong and now I have good hatches with them. I built my own cabinet incubator and hatcher and use them mainly---I been having 95 to 100% hatches using them in the last 2 years---my last hatch was 99%---233 chicks out of 236 eggs. I hope if you put 20 eggs in your new Brinsea---I hope all are fertile and you get 100% hatch on your first set. Good Luck!!