maybe slightly in my opinion, because what you want is the rear boost port to trap more mixture as the piston comes down to BDC. You would need to time the area open with a degree wheel on the crank going to BDC. I always like to use the piston, on redheads,they dont come with a boost hole. I make my own port in them to accomplish this.
In the second pic, I have cut those skirts before to be somewhat like what you have, removed the material in the dark grey, this opens up the rear entry point alot,very good gain when you add larger reed blocks.