Gary Matczak Posted March 31, 2014 Share Posted March 31, 2014 I have 4 sets of Olds contra bass parts that are the results of converting the valve rotor horns to 3 valve horns, using Kanstul conversion kits. Essentially what I have are 4 single valve and tubing sections, along with the 4 rotors and related tubing that gets replaced when putting on the Kanstul 3 valve section, which comes with all its own tubing. If you are interested, PM me an offer. Quote Link to comment Share on other sites More sharing options...
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