Can ya help a big guy with technique?

I am having a few problems getting decent air, and need the collective genius of you guys

I am about 240lbs. First strike.

I ride on a lake that does not allow ballast. Second strike.

I ride behind a Mastercraft X7 which as you know is a ski boat not a wakeboard boat. Third strike.

With weight, actually it throws a killer wake for a ski boat but I don't weight it every time. I don't risk pissing people off for a quick afternoon run.

I have always had a problem getting decent pop off of a small wake at my size. I have a ERA 147, which I thought would help but it has not done much.

I have had pro level riders out with me, giving me advice and they said basically that I am charging the wake harder than they have ever seen anyone do it...and I am edging all the way through it....but I just cut straight through the wake. Its a little better when I have weight in the boat, but still it has to be a technique thing because I know others my size can throw down pretty much behind a skidoo.

One guy suggested that I actually back off of the edge at the lip, to keep from cutting through it. That helped...but still no height.

My wake to wake jumps behind anything other than an Xstar consist of a progressive edge...hard as crap...ending up with me going faster than a slalom skier across the wake about 12" above the water.

Any suggestions, other than taking up slalom skiing on my lake