Ok the air temperature of my room is 21c the air temperature comming from the 120mm fan is 23c. The case temp at this time is 25c
What I did to mount the BIX was to remove the hard drive cage. Then I moved the speaker from the floor of the case and moved it.
Next I removed the floppy drive cage and setup the BIX on it's side. I hooked it all up then slid the floppy drive cage back in on top of the BIX holding it in place.
Hope that helps.