Redirect urls after migrating from Kunena

Having just completed the excellent migration process from my previous forum component on a test domain before repeating it on my live site - I'm just a bit concerned that the difference between easydiscuss urls and kunena urls is going to result in a huge amount of pages not found 404 errors - or am I missing something?

I don't want to retain Kunena as that will cause much confusion on my site so how are previous urls redirected please?

Thanks