took steve's advice on water blocking a hat.......ie - toss it in the pot and boil it up like soup. i got it blocked, cut, pounced and flanged. i'm not really loving it for some reason. i'm thinking of making 'hat soup' out of it again......hopefully more of the stiffener will boil away as well.
i blocked it moderately tall so if i do get any shrinkage, i can block it shorter and still keep the brim size.
question: what do you think will happen if you water block it twice? will the felt yield a better quality? will it shrink up like an HJ......oh wait.......nothing shrinks up like an hj
To be clear, don't boil it!!

Just dip it in the boiling water until it is saturated, which does not take very long at all.
If you are gonna reblock it, using the water, just dip the crown in, and not the brim. It will stretch as easily as it did the first time.
If you want to remove the stiffener, use denatured alcohol. Soak it a few days in the stuff, and do it outside. This stuff is poison!! That goes for the fumes as well. I use a plastic 5 gallon paint bucket, with sealable lid. You can use the alcohol several times before it starts adding shellac back to the hat. I have found no way to filter, or let the shellac settle down to the bottom. But, I am sure, given enough time, the shellac would settle. If so, you could siphon off the top part, leaving the shellac on the bottom.
Another hatter told me a few years ago to run the bodies through a wash cycle on the washing machine. I tried it, and it took none of the stiffener out of the body. So, that does not seem to work very well. Denatured alcohol is the way to go. Fedora