Enlarging PRP doesn't always help

pittsburghracer said
Look at lots of pictures and imagine it in 3D. I don’t make port molds as often as I should but probably will when I start my first LS head. I’m not sure you could even get the mold out of on of those damn heads. Lol

Well, I've resorted to this method, if the cured compound & form allow..;

Which allowed Me to extract these..;