Hi rewd,
First of all; this syx file and the aiwiy syx file dont work for me. The seem "empty" according to my axe. I tried another new preset (acoustic sim) and that one is fine. The ones you uploaded to axe exchange are ok to. I wanted to compare it to a sdd clone, but i cant right now.
For the sound you are getting; it's a good sound to my ears. Not sure if i can call it "sdd300preampish", but it is a nice sound for bad. I'll have a go with a preset of myself and see what I can come up with !