I surf my 08 outback dd and love it. For weight Im running 1200 lbs in the rear. I got rid of the factory bag which was 380 lbs under the rear seat and replaced it with a W710 fat sac. Then-and this is key- I plumbed in an IBS 750 lb bag. Forward weight is huge on the direct drives as this lengthens the pocket. I run a home built suck gate on the non surf side and this eliminates the need for surf side bias weight. Ive also made my own swim platform and fabbed up some stainless brackets which I made 2 inches taller than the factory ones. My factory platform was scrubbing the wake with all the added ballast so this was a must. You can check out my thread by searching IBS VENTING ??S and it should come up.
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2008 Moomba Outback LS
325 Indmar Assault MPI
Gravity 1 Ballast with IBS