Get few answers:
1. There is some place to buy more two fan rails??? I not found anywhere in internet and TT not answered my e-mails.
One TT guy said to send msg to TT: http://community.thermaltake.com/index.php?/topic/1874-core-v21-fan-rails/?p=12272... will try because TT Brazil did not reply.
2. Guys think that is possible mount 4x4 140mm fans with 120mm fan mounts on top?
Well, it is possible but with some casemod. The rails has that 90 degree 'side' as seen in:
Because of that we can not put 140mm fans in 120mm mounts, so if you cut that part of rails out, it fits. Maybe if you use some kind of fan holder or support it can fit too.