Ok, here is my problem. I have this negative that the foregorund prints great in a higher contrast and the sky in a lower contrast, so I am thinking of using the glycerin technique as described in the SUllivan/Weese book. But since this is a 12x20 and I have never done it before, I need some pointers.

Is there any risk of uneven development? how about one developer running into the different part? Should I start with the high contrast first, or the low contrast?

Ok, you pt/pd gurus, help me out here....