I took a few hours while waiting for my starter to be rebuilt to work on the ports; I limited my efforts to the divider down inside the ports.
The shape of this portion is rather blunt from the factory, and I was able to give it a sharper profile like that on a rocket's nose cone using a Dremel tool.
The ports can be protected by stuffing strips of oils soaked rags down behind the valves, and taping off the other ports. Remove the rags slowly, and carefully, then wipe out any residual shavings. I also used a shop-vac with a smaller sectioin of hose attached to help with the cleanup.
The results were pretty surprising, I had to raise the fuel pressure a bit to compensate, and it did add some real power, as well as better driveability.
Good luck if you decide to do this.