I've been replacing the Honywell units about once a year or less due to erractic readings, I have even installed the bullet type pressure regulator to help stabilize the pressure, also installed a remote mounted system to take it off the engine and mount it to the firewall using a cushsioned Adel clamp. The carbs are well synced and prop is balanced...is there an alternative to the Honywell unit? I have the D-180 system...