Highpeaks,
Hmmm, I think that you need to read my post again. I was just giving you a reason behind some of the comments. (ie 'you' are willing to accept a certain level of risk. 'We' try to do anything to limit the risks involved. This is different to your term: 'risk averse'.) If this means using 2 engines for banner towing work (and hence exposing ourselves to a much, much smaller h/v curve), then so be it.
I'm not looking to start a p!ssing contest.