Wow, all the elements draw the eye into the center point, has a great feel and read. Great print! Thanks for posting and adding the tech details about split grade printing, your approach/execution are wonderful.
You are right, #4 and more need double time. In this case, Base exposure was 20 sec with 4 1/2 filter with some dodging in the bottom part. I want plus 2 stop for clouds, so I made another 20 sec exposrue for clouds, this time with #3