Adapt turnkey plasma table to 4'x8'

I came across a turnkey setup for a plasma table.
Specifically the iPlasma 5.0 listed here:
chacich

For $4000 it doesn't seem bad for a 4'x4' setup. My question is how easy would it be to extend the table to 8'?

It uses C-Beam from OpenBuild, which i can only get in max of 5ft lengths. I'd have to do something creative to get more than 8ft. Yet the controls should still work, doesn't matter the length.

What's other thoughts and opinions? Is it as simple as it sounds?

Thanks!
Kip