Nick, one more observation to share with you...I did not find the "surge line" or area of density until I started to print some negatives (as you mentioned more so with sky), but after I went back and checked both 7x11 and 8x10 negatives I did notice on both...just harder to see on some negatives, but it is there. Because I must use a Beseler 11x14 drum for the 7x11, I caught it there first - with 8x10 negatives I use both 8x10 drums for single sheets and 11x14 drums for multiple. So be sure to wait until you print before you know for sure. I am using the Formulary P-Cat HD for my processing (ready mix in glycol since my darkroom time comes sort of infrequent these days).