LSP, I didn't reply to your first post. Felt it was out of line. Persistent ain't ya? Greg asked a question about piston recommendations. I gave him my opinion. As for slipper design. I will not divulge that info. Just for your info I retired from United Engine & Machine in 04', who is KB pistons and Icon. I helped build the machines that machine the slippers. Not of my design though, that was before my time. So if you're looking for a fight go somewhere else cause this is all the info you deserve from me.