I took the bag back to my LBS. They said they would take the beam rack back as well, but I can't use a traditional rack. They will order the Topeak beam rack and bag for me. I'm just concerned that the rack, where it locks in, will be too close to my saddle. They also have a basket that will lock in, but that poses the same dilemma.

I'm just bummed because I think the traditional rack would be better.

Maybe I need to start looking at something for my handlebars?

The saga continues......