I'm wondering if anyone has a fix for the wobbly horn button. I have multiple 329738 retainers from the 70s and 80s; no change between them. Though the horn contact, cup, and screws could have looseness, I've verified the looseness exists between the button retainer and the steel cup and this is where most of the slop comes from. Is boiling it and holding the fingers outwards to cool going to fix it? Or is it more of a looseness in depth, rather than diameter? I've driven one with 15,000 miles and want that again. Thanks.