So, here is the sheme I came up with and that seems useful for me right now.
While changing the knobs today, I had the idea to leave the "Program"- and the "Bank"-knobs as they are, or perhaps look for some other ones that fit better to the new knobs. But the mainthing is that they should have different shape.
The idea is that it could help avoiding accedentally tweaking these both knobs. So that also the "fingers can learn" when they get in touch with knobs that feel different - don't turn this knob unless your'e really shure you want to do that