Not yet, I have to make some time to get the springs from another material.

It seems the 5mm springs do fine, 10 pieces do fill up the space and almost no pre-tension is needed but the cheap springs I have now are to much temperature sensitive, I was told they loose power already at 80 degees celcius. The other material should withstand up to 200 degrees celcius and do cost about 40 cent a spring instead of 8 cent but then again you will come up to 4 euro a full spring.

With the 5mm springs there is an high rpm clutch engage possible with less slip, I have tryed the 7mm but I think it was to much. I also have the information about the kit sold by the german shop and must figure it out if that works better or the same, all I can say they are using a combination of several springs to a more progressive setting.

For us the winter season has started so there is some time although in my function within the Dutch NOMAC it is the time to list all new proposals and organise meetings working to the new season ;(