@Dennis - Here is a link to the Pure Vert site-
http://www.mikemurphyentinc.com/purevert.html - I think that you could put tanks and gates at various places on the boat.
Not as good as weight out at the edge, but alot easier to do. I think that jkw (lakesurfer) puts weight out on the swim platform and secures it to the boat, I think that that might be ideal. We are going out tomorrow morning and will try it.