ReCessna 421.... I know this is very old post, but if you are still interested in the operation of the 421, I would be happy to advise as I am currently operating one (4years) - and give good insight into operating the 421. It is an awesome bird, that can not be duplicated today for less than about $1.5 mill. With sensible maintenance and excellent pilot training this pane is the best bang for the buck in its category.