These look really good. However, a reminder -- for tournament play, use of screens between votes would be considered a variant rule. Alan's base rules explicitly call for unused cubes to be returned to "plain sight" after each vote (p. 4).
Thank you Tony. It's always pleasant when hard work is appreciated, and even gets a thumb or two...
To clarify on how to use these screens: There's nothing suggesting that you have to use them all the time when playing the game. You need only use them when privacy is required - namely when entering the bidding phase. Shove your stash of Wind Cubes behind the screen before taking however many you want to bid with, leaving the remainder hidden. There's no need for secrecy at any other point of the game, and the other players should be able to know how many cubes each other has.
I hadn't realised that I'd need to write instructions on how to use these, otherwise I'd have included that in the first page of instructions rather than just leaving it to common sense.