Tom, Stephen, Greg - Greetings from Portugal!
Greg - the standard tuning is simply EADG, which will be a bass tuned an octave higher. D'addario makes piccolo sets (EXL 280) which are the ones I put.
You can use any bass but bare in mind a truss rod adjustment may be needed to compensate the less tension of the set.
My bass had a smaller scale and I saw other players using a Fender Musicmaster for piccolo, maybe to play chords easily. Although we know no bass scale is too big for Chris' hands and the real Photon looks like a full scale bass
From the moment I put the strings on that bass (Eko Cobra) I really liked the sound. I didn't have to adjust the truss rod so it was ready to play. You might like to try the strings on a few to see which one you like the most. I hope I will be able to get a bass that I can have permanently set up like that!
Thank you all for the feedback!
Miguel