On Feb 21, 2005, at 10:00 AM, Ron Spencer wrote: > Has anyone done a mod to the 91bto quiet the vacuum relay? No - but quieting a vacuum relay is done by discarding the mounting nuts and using the mounting technique outlined at: http://www.somis.org/relay-mtg.html > ... Richard L. Measures, AG6K, 805.386.3734. www.somis.org