I have a Truativ Touro 50-39-30 compact triple on my SCR2.0 at the moment, with Tiagra shifters and front mech. I like it fine, although I still hanker somewhat for the 52/42 setup that I had on my first road bike, that I liked the feel of a lot more, compared to the compact setup. Looking around, a lot of "standard" triples seem to use a 52 - 42 - 30 setup. I'm toying with the idea of grabbing the required chainrings (9spd Tiagra, 105 and Ultegra 52T and 42T seem readily available), and giving the setup a try. Is it going to work? Any pitfalls in particular to watch out for?