experiences with the re-running DW importer?

[ratcreature]

So I've imported my LJ to DW in 2009 and consistently crossposted from DW since, so if I rerun it now, and only import comments, will that work out like you'd want it to? I.e. I get a backup of all the newer comments on the LJ entries added to my DW entries, but older comments won't be duplicated?

Comments

[ratcreature]

Some of the commenters changed their names but probably not too many. So I will probably risk it to get the LJ comments archived.