Jacob Oslick,You mentioned different "spinoffs" of SI and MI. Some of them I know nothing about, like the one in Philadelphia in the 1850's, the "irregular Brooklyn minyan" and the "hybrid S&P" in Atlantic City. Could you tell us more?About Mekor Baruch, I need more info too. I know it was founded in 1988 by H Josua Toledano, and I have two addresses: 8 Merion Rd, and the Lower Merion Synagogue. Was it 100% S&P?