HMPS said:
No reason to sound harsh,o.k.?
So yes,I have read it.
This project was not meant to have stepped switches originally.I don't know what link you refer to,also haven't found a dead end ( if you talk about the links to the docs etc. on Igor's homepage).
Stepped switches came up a while ago,I think it was member dagoose who first chopped the pcbs and added stepped switches.
So in any case it will be a modification since you will have to replace the original pots and wire them to the original pads instead.
For calculating them look at the sontec stepped pot calculator,member harpo was so kind to give us an excellent excel sheet to do stuff like this.