Apologies Keith, was looking at it though my rose coloured glasses (single focused) did not consider all the variables you have had to consider. If i may finish - with a single update button, then its upto me to how the variables are set, and i have CTRL-Z to rewind if have a setting not quite right, and try again.
But regardless of the outcome, thanks for all your work, we would all struggle without
the improvements you and the dev's have added.
Cheers Boof63
