Thanks for the replies! I spoke with the folks from DSE and they recommend using the solid mounts. Apparently, there isn't a great amount of difference in the ride between the polygraphite and solid mounts and obviously the solid mounts would not degrade over time. Even if I would want to replace them, they say you are be able to manipulate the frame to get the mounts out without having to undo the welds. I ended up ordering the solid mounts. . .