I can see where he's going with the Hendrix thing, sound-wise. The "Hendrix setup" also gives different string tension because the low strings have a greater length behind the nut (if you're playing a Strat or Tele, obviously doesn't apply if it's a V or Les Paul!).
But Hendrix still had the strings the normal way up (with the low strings furthest from the floor!). By also having the strings upside-down, Uffe Steen is more in Albert King territory - it must be very weird playing chords that way.
Fender made a Strat called the Voodoo Strat for a while - it was a normal right-handed model, but with a reverse headstock and reverse-slanted bridge pickup. So you could get the components of the "Hendrix sound" without having an upside-down body or having to adapt to upside-down controls. I think for a while Robin Trower was using a normal Strat with a reverse-slanted bridge pickup, too.
