ol' german milkers trick is a pan with soap (dish soap) put it out at dusk and every fly in the building will be in there before morning.
Very nicely done Daver, I don't know if I am ready for that, I was thinking however that Dave does so many projects that I would trailer my car up there and put up to his shop door. He would just do it thinking it's one of his, he goes through them so fast he'll never notice!! What do ya think?