I purchased a 2008 Malibu Response LXi 2 summers ago and i've begun to feel like my wake is bigger than similar BU's. It seems like some days the wake is non-existent and absolutely amazing. And other days I can notice a big difference with an increased wake size. I cannot for the life of me figure out what is casuing this inconsistency??? Ive skied behind plenty of '08, '09 and '11 models and they ALL ski amazing... The boat does have a slalom tower, wedge, stereo system with amp and a sub woofer under the observer's sear storage area as well as the rear seat in. Lately Ive begun to think that all of these "extras" are adding weight to my boat and just increasing my wake size, but when the boat is "on" all of these things are still part if the equation. I keep the tank under half full to try and keep the weight down as well. I also had my prop re-done last year, could this cause a change in the wake? Please help, I am at a loss and I havent heard of anyone with a similar problem :-(