Thanx, but this is not innovative but just something I have seen and wanted to try.

Maybe we will test it on the track next weekend. Just the feeling of it was very good with the 0.5mm discs but I have also 0.7mm which has twice the strenth and 0.8mm which has 3 times the strenth of the 0.5mm. They had only the plain steel discs which hold their specs up to 80 degrees celcius so I was told.

I think with the 0.5mm discs 10 pieces are enough to give enough room for the tension nut. The thicker discs will be milled to the right size to give it a try so we know what to use.

All about these springs can be found in here:
http://www.schnorr.com/docs/Handbook.pdf
Interesting is how you can change the character of the spring, with 10 discs you can try several things to get the best out of it

My sponsor was also amazed and when we have tested all sizes I think he will order several hundreds and put them on a bar to machine them to the right size.