You can set those string spacings any way you want, by adding new string slots. The melody string couplet should be about 1/8" apart. The non-middle string is an easy fix with a fine saw like a jewelers' saw or even a V section needle file. The grooves don't have to be deep, but they should be deeper towards the respective end of the instrument.
well I guess I could do all that but honestly if I spent the money for a new instrument then I don't want to have to fix mistakes. plus now I already bought my "new" old one and I don't think at the moment I need both. In fact the skinnier neck would now mess me up so I'm happy learning on the Walnut Valley one.
but thanks for the suggestions