Cooling holes in the body , how many do this

Just contemplating if i should cut holes in the windscreen of my body for cooling of the esc , motor and batteries .Not that i'm having any heat issues but it's winter in Australia so don't know what it will be like in summer. Plus alot more dirt will get inside .

How many of you are running without any holes and no heat issues now that's it's summer for you US/European boys.