Just saw a 2510 in San Diego last week with a T-Top and steering console/seat/shade up top. Looked cool, but a lot of tubing. If I see it again, I'll snap a pic.
Mgf by Pacific Yacht Towers in San Marcos CA.
He is actually doing a belly rail for our 2520 DV as I type this.
We asked PYT about that boat and he said that project was one of the most eloborate / $$$$ efforts he has done - lots of bends/supports/custom. Because its so high, you will likely also want to have it be 'retractable'.
Concur with the 'forces' comment from BradV. Don't scrimp.