If you have a good pro lab, stick to it they can do it better and more consistently. I was recently given a tour of a pro lab who have done my E6 films for years by the companys sales manager, I was Very impressed, if you walk near a E6 machine it can detect
your body heat, and a motor kicks in to adjust the processing temperature to compensate. I don't think it's worth the trouble when you can drop them off and collect them in three hours.