The Tiptronic transmissions I do, for Singer, are exceptionally difficult to make look nice. (And exceptionally difficult to rebuild.) The "center section" (the actual transmission part) is made by ZF. All of the pieces to adapt the transmission to the 964 chassis are made by Porsche. Completely different castings and aluminum quality. Getting the ZF "section" to look good has been a real challenge. Our most recent attempt, is the best, so far.