I'm in the market for a new stoker's female saddle for our Santana Beyond tandem. The one that came with the bike is giving me pudendal nerve problems, specifically debilitating nerve pressure on my sitz bones and pubic bone. When we ride double centuries, it becomes quite a problem starting at about the 40 mile point. I've done alot of reading on how to reduce the problem, so now I'm in the market for a wider seat. Does anyone have any suggestions on makes and models of seats that work well for endurance and ultradistance riding? We are training for the Furnace Creek 508 and eventually the PBP. I need to get this dialed in. Thanks!