that's not quite true, if the tune shop does not to the training they dont get access to the ZF tuning at all. The way Herrod has gone about this is perfect, yesterday we all got a full run down on what every table in the software does, and what happens when chaned and what will cause the gearbox to grab 2 gears at once and what will cause the box to die.. With out attending the traning course the ony way the tuner will know what works is to try it and could damage the box easily.. Im very glad we spent the money and attended, not only to learn about the boxes but to have a good day with a good bunch of people! Dale