Slowman, you have me intrigued. Why dura Ace for training and Ultegra for racing?
I am going to do more miles training and it lasts longer. Not much difference in shift quality between D/A and Ultegra these days (at least I can't tell the difference), the differences are in weight and durability. The weight issue is a non issue really a couple of 100 grams and if I only use it to race it does not get used much and lasts long enough anyway.

