Yea there are several porters out there porting these plated cylinders and have ported plated cylinders for years with no problem. I'm hearing their is some horsepower to gain with porting but minimal, something like 6 to 7 ponies, of course nothing like the gain from stock cylinders. I need to contact Dan at patriot and see how soon he can get some to me. I always hate sending stuff out somewhere after it has been polished, that should be the last step. Fireman, you have a number for Nate? If so PM it to me. Thanks. I'm also debating a 7mil, but man those cranks are high, about a grand.