Both a friend and I recently picked up 2 Columbia's. Mine is an Oak table model his is an upright Mahogany. I am new to Columbia's , where can I find a model or style no. ? Also we have the same problem with the tone-arms, mine is broken at the 90* and his just doesn't move freely. I'm guessing that this is because they are made from 'Pot Metal' I know that mine will need to be replaced but can his be sanded so it moves freely.