Thanks for your answer. If they are only 20€ in germany, I'll rethink the Encoder/Pot thing. I Thought the would be more expensive. But my question i meant an other thing. Does it work if I exchange them all, or do I need some buttons or Pots adittionaly. The space should be not the problem, I'm just asking for the numbers of buttons, pots/encoders and led. The layout will be an completely different, and that's why I'm asking, I'm drilling it right now, so i need to know the number of parts ;-) .terrorizt