When it comes to C41/E6 developing, just how critical is the temperature? I'm asking, because a few days ago, I bought a cheap aquarium heater, blah, blah blah...and after spending time fine tuning, I have my water bath up to 101.7 where it fluctuates between 101.6 to 101.8(F). Should I try to push the temperature up or leave it as is? This is for the unicolor kit from Freestyle, which specifies 102(F)