OK I will mellow and also withdraw my criticism. Sorry if I made any out of place comment. Pity we do not seem to have a grovel smiley or I would use it
Actually it is very difficult to improve on an Oly superfine JPG even using raw so that exercise may take a little time

Way back Wrotnia conducted a join exercise with a group of photographers to test just this point and the conclusion was that with great care you could do better with raw but it was not easy, the test will still be on his
web site although he has stopped updating it.
Roger