Re: Blätter- Ritzel -Kombi; ist das realisierbar?

Shimano cassettes that don't use spiders have most of the sprockets held together by 3 small bolts, or, in some cases, 3 long rivets. These bolts/rivets are not essential. Their function is convenience, in allowing the cassette to be installed slightly more easily. To make a custom cassette, you will often need to remove the screws or rivets. Just discard them, they are un-necessary in practice.