aren't the charades on MGM, Okeh, Mercury, and Harlem Hitparade all the same new york-area group? and don't they have some sort of main ingredient connection? There is some webpage with Dave Moore saying he was talking to someone getting info about it, maybe he can give more info? Also, I swear on a couple of their tracks it sounds exactly like Donald McPherson singing lead but it could just be coincidence. But I think the main ingredient did cover at least one of their tracks unreleased.