I bought a mono switch from another member on this site, which basically just puts two Y cables into a box to accommodate my laziness, and it sounds pretty nice my basic equipment. If you have high-end gear and the willingness to swap arms or head shells, that's cool too. I'm also curious about the question someone posted a few posts above. What about mono records originally released prior to 1967 but reissued later. Would those be likely to have been cut with a stereo lathe?