I am wanting to do a MOD but need some advice from the group. I don't like the distortion I get from my GPH4 Black in the distance. The curvature of the earth is exaggerated. I am wanting to MOD the lens with one of the Peau Productions lenses. There are a few options available. I want the distortion in the distance to go away but don't want to ruin the close shots. Does anyone have experience with this?