I did some more Googling and finally found some usefull info, heres what i've found sofar:
Fan next to HDD bay is 140 and another 140 can be mounted below that. Fan on the PSU/MOBO area seperator is 140 aswell.
Top 3 fan mounts only allow 120s.
Not sure about the fan mount on the back side but probably 120? If so, the specifications on the official site seem right sofar but what about the bottom, from the pictures i've found it seems like there are no holes to mount a fan, can someone confirm this?