Quote:
Originally Posted by Leon Crampin
Frank, the knobs are fixed with 4BA dome nuts (black) and shakeproof washers. The originals were bakelite, but painted metal nuts will match. They need to be very little more than finger tight.
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Just a word of warning for general readers of this thread. Leon's suggestion to use metal dome nuts for the A30 is perfectly safe as the set uses an isolated chassis but some Murphy sets that use the same knobs, like the AD32, are live chassis and therefore it would not be safe to use metal dome nuts,