I'm extremely interested in XF for its achievements and thread-prefixing (although I can't get the latter to work on a demo forum currently. I want it to look similar to forums.bit-tech.net threads for example). However, my forum is mission critical and 50k members in size: I must be able to test the ability to transfer vBulletin 4.1 database transfer in its completeness to XF - threads/members/forum layout, before I'm allowed to commit to the budget for the expense. We also need to evaluate the code that custom maps the member data from MySQL db to MSSQL db. Can you advise if there's the possibility of a limited test (~1-2 months) where our business can evaluate the feasibility of moving to XF? Thanks for your help.