Weighting Centurion Elite V

So my brother recently bought a 1999 ( I believe) Centurion elite V and we can not figure out the best way to weight it, we can't seem to get a clean wave. So far we have always fill a 750 in the port Locker then a 400 towards the front in storage under the port side seat then we have tried running another 400 in the bow on top the the seat, then we add another 400 as far back on the port bench as it can go or also across the rear kinda of counter weighting it. So far none of these setups seem to make a real good wake the shape and size are okay but it will not clean up unless we are turning. I would have assumed with the 2k in ballast and a couple people we would have a great wake but not the case. When we try to list as much as possible we have the rear rub rail in the water still doesn't want to clean up. Any ideas? Also it has manual wake plate that we have left in a neutral position( level with the boat hull) Would it help to move that up or down at all? Only other idea I had was to ass some sort of wave cleaning flap that I have seen others do. Any help would be greatly appreciated! Thanks