Agreed Pe. Polishing ports is something fun to do when you are bored and have little else on your plate. It's largest benefit is providing a short break from other drudgery.

The average modeler seeking better performance would obtain much easier, and quite pronounced gains, by alterations in ignitiontiming at high rpm and improved port design/timing. Most cylinders use ports originally developed for chain saws and lawn mowers. Not even close to ideal for our purposes. But you already know that. The port design and layout in the MVVS engine line is far superior to most anything else on the market. So good that one manufacturer has already tried to copy it.

Lest we forget, many would experience better performance through simple engine tuning and doing some prop experimentation instead of relying on reports from others about what prop works best. The highest rpm does not always equate to the best performance...