i made a passive design, since the fan which came from mouser, was dead from the beginning... since it is a 6582, it was not going very hot anyway... but i drilled Holes into the pcb under the SID-Sockets, and cut aways some plastic from the socket too.
i too drilled some holes in the plastic body under the Main-PCB too, the backside off the SID should be enough to get rid off the hot air...