Dave the front of the shell has a gap all the way round it, i think this will allow a fair bit of air through.
Also where the steering linkage goes, you can cut this back further if you want too. I cant see there being any problem with thermalling, i havent come accross any problems.
I think you can drill some holes above the fan for the brca meetings but if you are doing euros etc you will get ur wrist slapped
