A few things to think about:
Fab has come a LONG way from these, and I wouldn't let these pics sway me away from buying something that he's making now. I bought this amp from the original purchaser as a snapshot of Harmony Central history for a really good price. The amp does work, it's a very clean sounding amp and doesn't sound horrible. I've thought about recording some clips with it, but other stuff kept getting in the way. It's certainly chock full of features.
And now for a HC history lesson... Gut shots are pretty big, click on them to enlarge.