OK ... maybe I'm overstating, but I just got through modifying an already compact Steinberger 4 by cutting off the wings, gutting the electronics and replacing with a single phone jack that ties the two passive pickups together. It's light (6 lbs? ... I haven't weighed yet) and finally I have a bass that fits inside a standard suitcase. The straps attach to Dunlop straplocks that are recessed into the bass, thus with the Steinberger tuners, keep the actual length at just about 34" (string scale). Plus the overall design is very robust -- no batteries, detuning, warping or other problems. Just the essentials (and a Korg Pandora, of course) Here are pics.