You don't need that lol, just load your mic cal file and run sweeps of each individual speaker in at least 3 positions around your main listening position and you should get decent measurements.We'll see...
I haven't even cracked open the 131 page REW manual yet, so this will probably not exactly happen tomorrow.
As far as your listening tests are you able to switch back and forth quickly or are you just swapping out speakers every once in awhile? It's so much easier spotting differences if you can instantly switch back and forth, it's crazy how bad our aural memory is. It's nice to see the Wharfedale EVO series is good, they are definitely an underrated speaker manufacturer.