Im not doubting their work or the cars performance, especially if Niki mapped it. I know nothing of TDI or their Dyno
What i am always skeptical of is figures from Dynos without any comparisons. Niki's Dyno for example, many many cars have run there and it's almost considered a reliable benchmark.
Is yours THE car that made 299hp on Niki's Dyno? Pretty sure that's the highest he's seen on a K03, but i thought the setup had WMI