That was the thing about them too, it took at least two gallons before they were broken in. The deal was you either got a good one or it was a tosser. I had a lot better luck with the .68 then the .58s. I had two of the .58s break about the time I got them running kinda OK, I sent them back to Horizon and no questions asked, a new one came to my door soon after.
If all dealers gave them the drop it should tell us all something though. I have seen them at club auctions and they couldn't even bring in five bucks. Didn't take long for the word to get out.