I was just thinking about this myself and was planning on pm'ing A9L asking this before I order mine.... I did see in the instructions to put it on the side that runs the leanest, which means I would have to swap it around... ect.. if I put 2 in, then less for me to do later...
A9l, with one on each side, it would be more like stock where it would adjust more efficiently for each side right? I figure when I order mine next month, at this point whats another 120.00 to add the 2nd wb to the cart... lol