cvsup to 7.0 from 5.5?

[Chris Pratt]

How risky is it to jump directly to 7.0 on a 5.5 system?
Upgrade would be by cvsup. I expect mergemaster
issues anyway but this system is relatively vanilla in
it's configuration. It's duty is just rsyncing other servers.
The kernel is GENERIC minus drivers plus ipfw and there are
no kldloads. Can this jump be made? I was hoping to avoid
having to make two major release jumps by doing only one.

Thanks