A big difference between ours is that mine runs at 17.8v, for full power. Danny's run at 12v, maybe 14v?
It's absolute luck if you get an eBay chip that will tolerate more than 12v for more than a week, and even then don't expect it to run near 18v. Where as I accidentally had a chip running on 22v for a couple weeks, and it worked fine after I got the voltage back down too. The authentic test passed chips are much more robust for tolerance of voltage. This may be important if you're trying to get full power, like you run the speaker fullrange.
Danny probably has the link to his. One advantage his has is that he enclosure is wood between the binding posts, where as it is metal on the one he built for mine. At least I found a difference in SQ, by eliminating the RF inducing situation of not allowing the output + and - fields to interact at the point where they cross the chassis. In one my most recent posts I drew pictures
what I mean. It's funny because otherwise the metal enclosures provide shielding, so I'm not saying metal enclosures are inherently bad.