I decided to do a little experimenting with adapting the Onstar buttons to control my CK3000 Evo HF kit. I was suprised how little modification was needed. I removed the circuit card from the Evo controller and inserted it into the onstar button panel. I removed the onstar circuit card and did a little carving with a dremel tool. I was amazed on how well it fit. I had to extend the shaft for the rotary controller. It works perfect!
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