John,
I remember you mentioning something about this further back up the thread. I've come to realise that 'reasonably' is a word that fits more in my vocabulary than yours, or Joe's for that matter. Once I'm retired and settled into the new home I may well be making use of the sort of back-yard presicion that the pair of you are making possible for us mere mortals.

I've got a list of useful sites for software for that chip somewhere but not on this computer it seems. I'll try to find it and give you some links. Might be a few days though.

Kit