For many years now I have tuned my piccolo basses to ADGC, an octave and a fourth above standard bass tuning. My top two strings which are the G and C string are not wound and I have never had a problem with the sound difference or volume difference between wound and unwound strings, but that's just my experience. On my solid body electric piccolo basses which are standard Kiesel/Carvin B2 Basses the scale length is 34". On my acoustic and hollow body jazz guitar type piccolo bass guitars i use nickel as well as nylon strings. Those basses are 32" scale length. That is just because that is the standard scale length on those instruments which are Dean Guitars basses. I use La Bella piccolo bass strings on all of them. Since they are thin you can either cut them or just have more winds on the tuners. They fit just fine on most any scale length basses, no problem. Since 99% of the time the string rests on the bottom of the nut, as long as you have a tilted back headstock or string trees you do not need a new nut for piccolo bass strings. The tension keeps them in place just fine. I never even thought about playing a piccolo bass when I was younger, it just kind of happened by accident and it is just "stupid" fun!