With the MXZ you must put weight on the opposite side you are surfing as well if you want the full benefit of the surf gate. If you are listing to far, the surfgate has no bite. Kevin, it is bummer that you did not get a chance to experience the surf gate--it was most likely because of operator inexperience.
For a big wave we set our MXZ with all stock filled, 750# in to compartment on the surfing side and 750# in the bow. If you drain the tank on the surfgate side you really get no benefit from the surf gate.