I sure hope somebody brings these kits back. Didn't Doc D.B. Mathews design all 4 40 60 120 planes. I sure would love to have a 1.20 bipe kit still a 4 60 with a saito 80 in it. It's covered in plum crazy monokote. He also designed the bingo planes my dad was thinking and stockpiled these kits in 40 60 and the big bingo. I think the plans at one time were sold through rcm magazine. These planes are awesome and fly great good luck fellas with your 4 40's.