I recently (just before Oshkosh) ditched my factory engine gauges and EDM 800, and installed a JPI EDM 930 instead. If you wonder what it takes to do that, you may find some useful information in this video.
We went with the overlay panel option (as opposed to a full new instrument panel) for cost reasons, and because I have a feeling this isn't going to be my last upgrade in the foreseeable future. The A&P did all the metal work himself; looking back, I think he would have outsourced it to somebody with the right kind of CNC machine.
Other than that, I'm very happy with the result.
We went with the overlay panel option (as opposed to a full new instrument panel) for cost reasons, and because I have a feeling this isn't going to be my last upgrade in the foreseeable future. The A&P did all the metal work himself; looking back, I think he would have outsourced it to somebody with the right kind of CNC machine.
Other than that, I'm very happy with the result.