Thanks - I watched it a long time ago - ready for a re-run. All his PRIUS YouTubes are worth watching, particularly for PRIUS drivers, it gives an idea of what's going on behind the fascia. Some of his other ones are fascinating - like the assembly of a CVT belt - I think over 400 parts!!! And the FORD/Gertrag PowerShift gearbox. He's currently making a series on the history of Auto Tranny Fluids - watched the first - long, but has snippets of information on more than just the fluids. #2 is out now of that series.