The walkthrough transom is a great feature, but limited the hidden weight while surfing but here is how we surfed it, regular or port side set up:
stock port and belly full, Starboard about 1/4-1/2 full depending on people weight, 400 lb sac in rear storage full, 400 lb sac in walkthrough full and 300 lb sac full in bow on surf side. All the people weight in the boat we evenly distributed along the port side bench. Hydrogate was always pulled back.
This boat really like front weight from what we experienced. We did not have a massively tall wave but it was real nicely shaped and had a nice long pocket. I'm sure you can raise the heigh and the expense of the length by moving some front weight to the rear. Go to planetnautique.com and do a search. There is another guy on there that puts a 1000 bag in the walkthrough that had pretty good results. The surf wave is definitely the least attractive wave of the three sport waves it puts out. The ski bump is nice at speed and the wakeboard wake is real nice.