I've got a question for the guys who have actual knowledge on building 7M's...the Probe forged pistons for sale on Driftmotion, how's the quality on them? Has anyone ever used them and is able to provide feedback? I'm going to start building a second longblock I've got lying around and I was looking at a Probe set. Just wanted a little insight, guess I'll go google them in the meantime. Thanks guys!