As I recall the top part of the seal is so close to the bottom as it passes in that there is no room. I had also tried one of those spring clamps simular to whats used on the oem fuel lines & it either didn't fit or rubbed. I did send some time putting small washers as shims & adjusting things so the rods pass through as centered as possible.
Don't feel bad Greg, I just put mine together 6 months ago & I am forgetting details....