So, I just did butta's mod on two 3630 compressors. Very easy to do and boy does it make these things sound good. They are actually usable!
I would like to note that I found a 9vac wall wart that fits the current jack in the back. It is made by Harmon Pro, model P50913B-120 and is rated at 9vac, 1.3amps. I found a couple on ebay. They make the mod even easier.
I got one of my 3630s from a local studio who has all the shizzle (including a Neve 8068 board) and he gave it to me because he thought it was a hunk of junk, which they are stock. But now I'm going to take it back to him and let him hear what it sounds like now! I think he'll be mightily impressed.
Cool mod! Thanks!