I love X-frog and would be interested to see how Tune works. I guess I will just have to break down and take it off the wish list and buy it. :O) Ultra renders take a long time I have noticed. But that is what I need for my prints @600dpi. So I feel the rendering pain almost daily. 4.2 in ultra mode is much faster than Vue4pro in ultra mode. But the results in Pro are fantastic if you can be patient and wait it out. Good things take time.