Anyone who has been enjoying this thread will have noticed it's missing. You can thank me for that - I posted something incorrectly and managed to delete the whole thread instead of my post. Attempts are being made to reinstate the entire thread, but we may have to wait until Otto Puzzell is available. If my action is irreversible, I do recall that the last number was 255. Once again, many apologies. I HAD NOT BEEN DRINKING ALCOHOL!