I am thinking seriously about having a 5 string neck made for this contrabasetto. I think Andrea can do it and have it final fitted here...Another advantage of the neck off design. I AM having a new bridge made with adjusters mostly to put a adjuster pickup in there but also I suspect that with the combination of bridge adjustment, overstand adjustments and tail wire adjustment the bass can be dialed in just right....for example this week I made the tail wire shorter (on my big bass this adjustment opened up the instrument some) on the Contrabassetto it freed up the A string to vibrate more fully which changed the emphasis from the octave harmonic (which was bugging me a bit especially with the bow) more to the fundamental. Evened things out a bit...But I can see that depending on the strings, having all of these adjustments available puts a lot of power into my hands to get my sound. With my big bass I am entirely dependent on a Luthier and the adjustments can only be made occasionally...