Joe: A cat hair, you say!
I run a spindle-clamp weight on my Pioneer PL-630. Does it help? I have had it on since I first owned the 630, but I might be apt to say the difference of it on than off is slight in the lower frequencies. That's good enough for me. The same record clamp made a bigger difference on my Ariston RD-80 Transcription Deck, with a full floating suspension.
Nando.