I do know there are people,like West-Tech,Larry at the site I linked to,and a couple others,who can retrofitthe old ceramic cartridges with more modern needles. Roger ________________________________ From: Bob Olhsson <[log in to unmask]> To: [log in to unmask] Sent: Sunday, August 14, 2011 7:42 PM Subject: Re: [ARSCLIST] 45 groove size -----Original Message----- From Steven Smolian: "...I'm about to install a RCA 45 player in the "45 Corner" of the shop. I'm leaning toward putting in a cartridge with a .5 mil point. That should protect the .5 mil grooves from being damaged by the device's usual 1 mil stylus and allow ok if not ideal sound from the older records. It will also cancel all vertical noise. .." I sure wouldn't play any valuable 45s on one of those because of the arm design. A smaller stylus really won't offer better protection. Bob Olhsson Audio Mastery, Nashville TN Mastering, Audio for Picture, Mix Evaluation and Quality Control Over 40 years making people sound better than they ever imagined! 615.562.4346 http://www.bobolhsson.com http://audiomastery.com