Flying Hex puzzle #2

Flying Hex puzzle, designed by Tom Jolly, laser cut by Walt Hoppe, computer analysis by Robert Henderson. The object is to move the pieces, one at a time, rotating as needed, into any vacant holes, such that all the pieces on the left end up on the right and vice-versa. That is, the pieces swap sides. The "easy" initial configuration requires a minimum of 63 moves, and the "hard" configuration, discovered by Robert Henderson, takes 89 moves. It's a tricky puzzle, and you'll be wondering how to move that big 4-unit piece through that narrow gap with all those other dang pieces in the way.

Buyer pays for actual postage. Postage will be calculated after auction. Puzzle with packaging is 5 ounces, and measures about 3"x5".