I upgraded from gravity 3 Ballast in transome to 750's in rear made a huge difference in surfing got a very nice curl on our LSV. All plumbing is the same plug and play didnt take that much longer to fill.I dont think they need to be full wakeboarding maybe to 400.
Anyone else have these bags ? still have the others probly want use them since we always have 8 or more usally.