[john walker's workshop]

if you do one switch at a time, and have a helper, leave the switch somewhat loose and have the helper slowly push down on the pedal while you watch for air bubbles at the threads. stuff a rag under there to save the mess. when the bubbles are gone and just fluid comes out, tell the helper to stop and keep the pedal where it's at, as you finish snugging up the switch. then do the next one. to keep any more fluid than necessary from leaking out, have the new switch in your other hand, and as soon as the old one is out, start screwing in the new one. sometimes you don't even have to bleed, as the minor air bubble, if any, just goes upward into the reservoir.