Pretty sure I know which 6x6 you're talking about, and yes, it's a KO. I've heard it's not a very good one, either.
As for 6x6 mods, yes, people used/still use V6s. I have one modded one that eventually fell apart because some of the pieces broke and the pins fell out, and one unmodded one that clicks and is really loose. (I just hate 6x6s in general.