Speaker Setup.....

The only thing "wrong" with  Master Set is aesthetics of the speaker position. 

You may have find the second speaker more forward/rearward  in relation to the "anchor" speaker to balance the sonics.

Visually, it may look lopsided. Great sound once found.

As mentioned earlier, and in the video, speakers likely won't be perfectly spaced apart. If aesthetic isn't important, it's the way to go. You simply focus the speaker position to your ears. 

I use Cardas.
http://www.cardas.com/room_setup_calculators.php
Acceptable  sonics throughout the room. YMMV.