Sorry to hear that, unfazed.
After I wrote to them initially Delkevic offered a replacement, but after another attempt at fitting them and getting a borderline satisfactory result I couldn't be bothered with organising an exchange and going through the fitting routine yet again. I also figured that since they're all bound to have been made on the one jig, they're all going to be pretty much the same anyway.
It's very disappointing that something priced at the top end of the pattern replacement market barely fits despite the flexibility allowed by the joints into the collector.
I just went out to take a couple of photos to give a clearer idea of what was necessary to make the pipes fit.
You an just about make out the extra nut needed as a spacer so the rear bracket doesn't get forced all the way over to the mounting point.
The downpipes
were about 10mm from fully seated… and now I find that over the past couple of thousand miles the springs have pulled them almost all the way into the collector. Which probably explains why the thing sounds crap again: the leverage must have opened up slight gaps where the pipes clamp to the cylinder head.
I've just written to Delkevic again. I can't waste more time on finding new ways to bodge these onto the bike so I've asked for a refund.