The cheap EUBs started with the Palatino VE-500, then Stagg brought out or rebadged an identical one. I had a Palatino, later upgraded to an NS. The Palatino/Stagg/HB use endpins, the NS sits on a stand but has an endpin option. If you're switching between upright and something else, or have long gaps between songs/tunes, the stand is more convenient. I think you'd just have to change the bridge on an NS to switch to leftie (possibly just turn it round). You'd need to do something about the sockets for the side pieces to change the endpin types over.