I was shocked at how easy it really was. First remove the dock insert, then on the silicone under-layer of the case, simply cut off the plug covers and the phone plugs right into the dock without any hassle.
But I wasn't done, in that configuration the whole phone is basically supported by the usb port. An accidental bump or nudge could render the phone nonchargeable- no good. So I set to work with an exacto knife trimming out the dock insert until it was just right to provide support to the back of the case, broke out a little sand paper to smooth out the roughest portions, and presto! Pics below.