I believe there are a few 6 stringers in the Ergo thread. However, some complain that the neck is too wide, which makes bowing quite difficult and transitioning from a 4 to a 6 hard. not sure how they compare to NS, though
Ergo does make a 6 string EUB that you can bow on.He'll make the neck pretty much how you preferr it(he wants the customer to be comforable as they should be). ergoinstruments.com
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