need some tips on weighting my boat

Hi guys i recently picked up a 99 maristar 230 which i know isn't great for surfing but it fit the budget. Does anyone know of a good starting point or have pics of a well weighted boat? I have a few sacs that came with the boat, and am looking at buying some more but would like to have some direction before i just start spending money on sacs. Its the same hull as the 00-05 X30 in case anyones surfed those. So far my searches here and mastercraft forums haven't turned up much.