i bought a copy of this at the Isis show a couple of years ago at a merch table discount due to the known warping issue.
sure enough, i got home and opened it, and the tone arm got bounced around like the SS Minnow.
i went down to the basement, found a big pile of leftover floor tiles from a bathroom renovation, and stacked them on top of the LP.
fast forward ~2 years...today i uncover the LP, take it out and while there's still some slight wavering, it plays just fine. nice.
