This valve was easy to install using a 2-1/2" diamond hole saw to make the cut for the faucet trim installation.  The fittings were standard 1/2" threaded male fittings for easy conversion to PEX.  As an option, I capped the extra position #3, so that it could be used for a rain shower head in the future.  Excellent form and fit when used with the Delta "Trinsic" Bathroom Diverter Faucet Trim.