I have '53 Kay M-1... It is set up with some pretty stout flat wounds. I am new at Upright Bass. I ordered some Superior strings...low tension...hoping these will make my learning expierence a bit easier. The bridge appears to be pretty warped and I would like to replace it with a good inexpensive adjustable bridge. If there is such a thing. All I have found so far are ones made in China or Japan and they do not specify the wood used...could be Balsa as far as I know. Can ya'll direct me to some good quality adjustable bridges? I am pretty good with wood products and have been playing and setting up guitars for about 40 yrs.