vbulletin importer

We have an old forum - about 8 years. We have VBSEO installed which rewrites URLs to be more SEO friendly. Will these URLs be preserved or is there some mechanism by which the old URLs would be permanent redirected to the new Xenforo Urls?

While going through the built-in import, once I got half way through to Import Forums step I got stuck at a 500 Error. So while checking error_log I found this error got generated: [22-Dec-2016 06:04:21 UTC] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate...

Will it import tags after the forums have been imported for almost one year...

I did a test import of a VB 4.21 Gallery into XFMG 1.1.0 B2 Empty albums imported the correct 'Create Date', but 'Last Update' says "Jan 1, 1970" I haven't been able to test whether this is also a problem on albums with images as I ran into a bug with the importer not correctly importing...

It would be extremely useful if we could import tags from vbulletin. For example my site has 35,000 tags which we really need to keep. I'm sure there are many like me.