I mean no disrespect. It is a ploy to get the buyer to refocus and gather thoughts. Adding a statement about resale is supposed to be viewed as a positive thing by the buyer. In fact since the exhaust port cut out is lower than stock a reduction of static compression is realized. The thin gasket can just account for the loss.
Any additional compression has to come from the pop up dome.
Unknown is the difference in volume of the pop up piston. The engine must spin to 9150 rpm to make 23.3 hp - the full 6 hp claimed. It is because of the above data that I believe this piston and gasket do not increase power by the amount claimed. It is unclear to me whether the stock Blaster exhaust system will allow the engine to rev that high since its tuned affect peaks at 7000 rpm and it would have to have enough wave amplitude left at that level to continue to make power. A two stroke engines peak power output can be defined by the amount of exhaust port area it has.