I have always intended the cockpit reach to be the distance from the BB to the Top of the HT, as head angle will not effect the amount of room between the feet and hands when measured this way. This is a great way to compare bikes from different makers as I have ranted on about in the past to some of you, that without a consistent way to compare from frame to frame a TT on a bike without a somewhat normal ST angle terminating at the BB center is worthless.
Stack! When Sam mentioned that their idea was a second measurement, this one verticle, I was totally for it. Now, when we put the RFX and the 5 Spot R&S on the spec sheet no one will be confused about how different they would sit on it. As I have mentioned int he past, at least once! The difference between the RFX and 5 Spot in fit and trail feel is immense, and part of the difference will be conceivable with Stack, then throw in there slacker angles, shorter Reach and longer chainstays and Voila! Different sister