Hi Ian, its the short input shaft. The correct one for four cylinder conversions. This box cost over a grand as it has the uprated parts and different first gear in it.
On the RBRR front we completed the RBRR in 2014, we also did the monte carlo Glasgow to Reims as well as many other drives. In total since being built the T6 has covered about 33,000miles. Ive had my fun out of it and its a very well sorted car.