Just got a nordymute for my 77 custom. Instant 60's thud, esp with the flats I have on it. There's not enough room between the pickup and the bridge on mine for the normal hunk of foam under the strings and I never liked taping foam or felt over the top (even though that's clearly worked for Carol Kaye). So far, I'm pretty impressed although i'm less impressed with my dusting ability. Time to get out the q-tips.
Any of you mute with things like this?