I was recently introduced to En Plein Air Pro when I saw Citizen's Sketcher, Marc Taro Holman, standing in front of what looked like an easel to envy.
Eric Michaels' En Plein Aire Easel
It is designed for watercolour, and is so simple I can hardly believe my eyes.
Now I have to figure out if I want to risk buying another easel and if my tripod is the right dimension for this set-up.
PS - I checked the reviews and oh, dear, Frank LaLumia recommends it and he is among my favourites in the plein aire kingdom. More pondering and purse fidgeting.
PSS - A birdseye view of the easel and the Citizen Sketcher at the Lisboa Symposium, via Omar.