Found this in one of my searches for CHIC related sites, all because I'm reading the biography and this re-activated my interest in the CHIC Organization. Apparently this promo release (Cotillion DMD 229) of Sister Sledge's Reach Your Peak from their 2nd Edwards/Rodgers produced LP is different from the album version. I never heared it and had to listen closely to hear the difference, which is at the end where they stretched the instumental part about a minute longer to a total of 5:26. The b-side contains the same version.