Ohhh, I don't think you want to do that. The Webers are expensive and the zeniths are a PITA. sound like a vacuum hose has popperd off or a diaphram has sprung a leak if it ran beautiful for 3 years they can't have gone that bad all of a sudden, its probably just one thing on them that has failed. I don't know them well enough to say what but stick with the devil you know.

...Unless you want to trade me for my Zeniths .

Mark