There is actually just enough room to mount a thin fan on the 060 directly. Of course it will have to be raised slightly so that air can escape around the sides of the cpu, or use a fan with this in its design (there is one on my apollo 1240), and you can do this with your trap door in place as well, but you will need to cut out a square section for the fan. It can be done, and with the trapdoor in place...but it will just take some thought and effort.