[Jeff Lee]

To be more clear on my prior post, I was specifically referring to the valve pockets ONLY on the JE pistons. And to be fair to JE, that was years ago (about the time that CP was new to our market) and JE may have fixed the issue. In fact, they may be cutting the ring lands with a laser by now. So ask.

I suppose the question to ask any piston maker is a) what are the control tolerances on the ring lands, and b) what defines the valve notch (or dome or dish as it may be)? There's a lot more to it as well. How is the skirt ground?
And some pistons will be perfectly legal yet yield a higher compression ratio.

Realistically, you should have your machinist order the pistons and ask all the questions. If he's an experienced engine builder and knows how to make power, let him do what he has to do. And you have to take into account bore diameter and ring package availability. I've spent upwards of $1200 on rings because they were a bastard size. Now that NHRA allows a larger bore size than in the past, it's worked out for me as I can now get something closer to the common 4.250". That will save a lot of money!

You gotta take it all in and I'd say the last consideration should be the price!
Ring seal...ring seal...ring seal!