I have an old Trimble RTK setup, still works great but the old Trimble 5700 receivers don't have any of the new constellations. This isn't a problem for the base, but if I could use my T2 as the rover I think I'd probably have less trouble getting good positions under tree cover and near buildings. I know that I'll need to purchase the DGPS upgrade for my T2. Will I need to do anything else to get this to work? Anybody else doing it?