Luthiery Laboratories

This fretless sounds really cool, and is super-easy to play, as you no longer have to stretch your hand unnaturally just to make ordinary patterns. It is set up with flats I found in the junk box. Can anyone tell me what kind of strings have blue thread leaders? The intonation fell right in, which is surprising considering the bridge was previously set up for 25.5" guitar strings. ( Actually, how important is intonation on a fretless anyway? )

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