O yea.. one other concern for me is:
If you have slime in your tyres and you do get say 2 or 3 nails in it that you wont know about as its still pumped up... does that increase the chances of high speed failure?
Something to think about.. and before anyone starts on me saying "we check our tyres daily" there are always going to be those times where you forget or just plain dont have time to.