i went to Jeff & Larry's (88th st & 2nd ave) last year to buy a specialized saddle. They didn't have my size (143) in stock and offered to let me try a serfas MH-RX (heavy ass saddle that has been OK for the past year). When i left, they assured me that 1)they'll order specialized saddles in 143mm, and 2) i have a week to bring it back, assuming i didn't trash the serfas saddle. I ended up not needing to do the exchange as im not a real weight weenie.