The Tremond is an excellent Rat pedal, and I don't see it getting anywhere near the love it deserves. It's a hefty tone, and yet aggressive. Isn't the Rusty Box based off of a Traynor? I know nothing about Traynors or Rusty Boxes, but I thought I've read about it being clanky?
In regards to clank, I can get some bit of clank from my MBD-2, but I'm unfamiliar with Jesus Lizard/Shellac to know if that's the right kind. Most people who want clank think of Darkglass or similar. I currently prefer my MBD-2 tones for what I used to use DG for as my #1 clank tone. I also have found I prefer the Guptech Bassbone to a B3K. (I never got along with ANY of the bigger DG pedals, though I tried. Too much high end fizz for me.) I'd probably wait for the following quote to happen, though - everything Damnation makes is excellent stuff (as I'm sure you know)!
This has me intrigued! Any sort of tonal hints/goals you were aiming for in this build?