That is what i plan on doing moving the 400# sac to the front. At the moment since the only free time i have is being able to spend on the lake instead of modding my ballast. I have been just using the 750 in the walkway and filling to however full it can get. I can say the wake has gotten a whole lot bigger and the planes out so much easier. The only problem I am going to have to figure out is how to fill that 400# sac w/o spilling water since the connections are on the side instead of the top like the 750# fly high sac i have. I might make an extension fill hose for it. Just have to wait another two weeks before I can go home start my summer/boat projects.