These Grohe and hansgrohe rough ins are causing problems. Tile showers are having to be torn out and the valves reset. You should be able to do the rough in separate from the finish but I and others are having trouble getting the grohe's rough-ins to fit the actual product. I have not roughed in the valve you have selected but i would still wait. We have more slack on our American faucets. 1/4" off on these grohe's and you may be stuck.