I just revisted this, sort of on accident. I wanted to play around with some fuzz and a treble boost based on some recent exploring on youtube. I built this off of the Hiwatt amp block I just tweaked for Cygnus.
I perked up a little when I switched from a FF to a muff with the TB on. So I saved to an empty preset and started tweaking and going back and forth with my original Cherub preset (also tweaked for Cygnus).
I like them both, but I'm digging the little bit of fuzzy craziness on the new one.
So here is the new preset, and the original preset updated for Cygnus. I build my presets to sound best through a SD PS170 into a forte style 1x12 with a cream alnico, since that is how I play live. So, you might want to adjust speaker impedance and drive settings (mine are ss amp and no compression), and choose an IR that you like. I use the Factory 161 and 162 mixed since it sounds closest to my live rig, but I haven't tried it through my FR monitor yet.