Hello. I just upgraded to a JPI930 engine monitor and will have available soon an Auracle CRM2100 engine monitor and gear. It is in working order when pulled, no known discrepancies. I also have the fuel senders and dash meter for its electronic fuel gauge (R/L tank). This unit was in my F33A CE-1149 IO-550B when I bought the plane 3 years ago, and it’s been great - no issues at all. As much as I travel, I just felt it made sense to upgrade to a serviceable unit. Phil Nichols (18AZ Arizona)