Why are you guys running a Bravo 1XS instead of a Bravo 1FS on a Yamaha SHO? You don't need the extra venting of the XS ? Most need to plug the extra 1" holes in the XS because of too much venting with the tourque of the SHO. With the 1FS you would only have the PVS holes too worry about. I believe that between the FS and XS that is the only difference. Correct me if I'm wrong....