Sometimes just leaving thing alone and the chainsaw fairies will work their magic! The JD CS- 56 is working just fine now.Had a chance to get back to the cottage. As far as I can see the chain is not rubbing, but it looks like the chain brake band maybe. It didn't rub last year. So I don't know why it would suddenly start to rub. Yes the brake is off.
Also a Homelite 35SL that had me in fits just needed more gas in the tank. Somewhere I remember reading that you should never try to tune a saw with less than 1/2 a tank of fuel on board. well seems true!