Step 2: Remove Old Regulator
I placed the wrench around the body of the old regulator to get it off, as I couldn't turn it by hand. As soon as I applied pressure the entire regulator fell to pieces. After that everything came off easily. You'll want to save the female quick connect to use on the new regulator, if it's still in good shape.
I also saved the gauge. The new regulator came with one, so now I have a spare for another project. Sweet!