So tell me, what's the benefit of the triangular wheel over the square wheel? It eliminates one bump... Ron N -------------- next part -------------- A non-text attachment was scrubbed... Name: caster.jpg Type: image/jpeg Size: 26548 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20061109/99158789/attachment-0001.jpg
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