K2 is an amazing extension, with strong community.
May I ask why You don´t install (for instance SMF forum) at same hosting where demo site is?
SMF is free, install goes fast, just put in some free modern theme, if You wish. Easy to maintain.
I mean, there is many persons here who are more than glad to participate in forum discussions. But this forum will not even allow You tu put some code in!!???
