Im about to purchase an '07 66 rc2 eta and it just occured to me that I might be bugged by performance loss due to the lack of a second compression cartridge that my 06 66 rc2x has enjoyed. I have very limited expereince with the eta cartridge but I imagine it would decrease the forks gnar potential when compared to an X equiped fork. Am I wrong in thinking this might be so? I happen to have an X cartridge around. So, if I hated the eta would the '06 X cartridge drop into the '07 chassis?