I had an issue the first time I drove my 7 any distance that I was able to fix at the roadside without tools.
I was on my way to a Club/Caterham F1 event at Silverstone. Upon arrival, chatting to another member they were astonished that I ever considered going out in the 7 without tools.
Since then, I have carried a range of bits and pieces that I expect to sort all but major failures.
Needless to say, in the ten years since, I never used it (apart from the odd minor thing when parked up).