Both hands playing thirds. So an m3 in the left hand, m3 in right hand, to start.
Minor scales, but melodic. It's still a 'melody' if you're playing the scale. It's harmonized, but I just think it sounds more normal being a melodic harmonized scale.
I haven't seen them. I found major scales in double thirds. I'm looking for melodic minor. Or just minor in any form to get ideas. I'm thinking I'll probably have to actually come up with the fingerings myself.