Hi Steve, I am sorry to hear that you have been feeling unwell, there was a particularly nasty virus going around the UK about a month ago which sounds very much like the one you have been suffering from and it flattened loads of much younger and fitter people than me.

I cant offer any more on balancing your crank other than to offer moral support and also to add that this topic is something that I have an interest in so I will be following your progress.