If you have the 242 and you are surfing, is there any other alternative besides a wake-shaper?
Unless you are going to install after-market surf tabs.
242 will need the big 1100 bags in the back. You can also add lead or extra ballast bags in the back on the surf side.
Upgrade the prop and you will not have take-off issues.
At 240#, you should not have an issue. I'm under that by 10-20#s and have no issues. But I've seen bigger people ride it.