So after HOW MANY YEARS I'm finally getting my enlarger. I'll be picking up a Durst F60 this weekend, complete with manual and other things. Is there anything I should know about this particular one? WOO! I'm also going to have to be on the lookout for a lens, probably. Since the Componons aren't exactly hard to find, it'll probably be one of those...but is there any real reason to use the more expensive f/4 lens over the f/5.6?