The wing wires has to be considered as fully functional, the 3mm tightners provided with kit seems to be strong enough to me. My friend (Kris Knutsen), used the 4mm version for his 3rd scale Stearman, he recommends the same size for the 4th scale Waco. He also used nuts & bolts to attach the wires to the fuselage and wings. The mounting devices are developed and produced by himself, the original ones didn’t has the good looks of his own design. An “Indian dance” before flying is as annoying as necessary, just a part of flying large scale planes I guess. I wouldn’t trust the plastic, as well as the metal quicklinks very much.

Grtz,

Gerry