I have a 2015 Mojo and I have found the following to produce the best surf wave for us. We have the surf edition with the bow bag and I've upgrade to 1100lb sacks in the rear lockers. I also upgraded the surf plates to the larger version 2.0. I fill rear locker bags and everything upfront completely full. I took the stock rear locker bags and placed them under the rear seats. Last year I used the Tsunami pump to manually fill the bags under the rear seats. I found that filling the surf side and leaving the non surf side bag empty produced the best wave. We mostly surf on the port side and set surf tab at 65%.
We found the paddlewheel was about 2 MPH off at surf speeds, based on GPS readings.
I am about to pull the trigger on getting the bags under the seats plumbed in.