Maybe that's where my question marks in my head pop up with what I can and can't do , everyday I buy pistons and my choice for rotating assemblies at a price cheaper than "shelf" price. AND, I have spent too many years learning from the men who still make a small fortune making these things last under the most grueling conditions. Over thirty years ago, I learned the old school way of paying attention and studying why and how it works so my decayed brain cells from the engineering classes I had to take would have some substance and a dedicated effort in life when it comes to making these things romp, snort, stomp, and win. I'm glad you guys have a thought to put out here. We wouldn't be accomplishing a thing if everybody thought and built the same way.