Ah... you were one of the few that I thought of first when I started posting here.
if everything works out right, I will be looking to sell/trade my bike in favor of two 600's come winter time.
Sweet! One for track and one for street?
Since you probably helped many more riders with this than I, how far out do you typically find the sag to be, prior to adjusting? I my expirience the factory specs arent that far out, consider most riders can't commit to any single type of road surface.
I have the fortune of running into people that are really big, and really small. Not a bunch in between. With that being said, and rider sag optimally being about 33% of the full stroke of the suspension for the street, I've seen many that are about 20% out of that. Examples are bikes with almost at 42 mm when we are trying to attain 35 (and thats for street, this guy actually track rode the bike). His rear was not much better at about 37 mm when we started. But by that point, I didn't want to get 35mm, I wanted to match the front. Which we couldn't do. Then, to complicate matters, he'd pulled his forks about 15mm through the tubes!
This is all with the stock components. We pulled the tubes flush after I told him he already had the front lowered (42 mm sag in the front, 37 in the rear) and we actually got 1 mm sag in the front before sending his stuff off for springs. Some .95 and a 9.5 later, we have track setup at 28 and 28, and he has rolled considerable time off his laps, and still can ride the street well.
I run into all kinds. I'm trying to get formally schooled by a reputable suspension tuner, and I may start posting specific "case studies."
But... a whole bunch of typing later I realized I haven't really answered the question. MOST of the riders I encounter on the street, and many at the track don't know much of suspension. And the problem is, the handling characteristics are built around the geometry of a balanced chassis. And running out of suspension not only upsets the geometry of the machine, it places an undue sudden burden on the tires, as they have to take up the suspensions job if the component bottoms.
Part art, part science. I think it's a lot of fun.