Thank you! So far everything is working well.

The only problem I had with this quick tool change was that on one occasion the tool holder started to slip out as I cut with an 8mm endmill. The Bellevilles had been tighten by two full turns of the drawbar (after finger tightening) and it seems that the tool wasn't getting enough grip by the collet. So I increased the Belleville tightening to just over 3 turns of the drawbar, and now it seems to be gripping properly. These things always need a little fine tuning...

Edward