I just saw this video on another thread. Cabrera's swing sure looks like full extension at impact to me. I often show my students videos of his swing to help make my point about how full extension is one of the keys to real power after the rotation of the body. Check it out... ESPN Sport Science: Miguel the Masher - ESPN Video
Yes it is a good one to look at. You can see the triangle and you can see him lose the triangle. I have embedded a short version here to watch: P.S. "Keep the front shoulder in there"...maybe not.
I just saw this video on another thread. Cabrera's swing sure looks like full extension at impact to me. I often show my students videos of his swing to help make my point about how full extension is one of the keys to real power after the rotation of the body. Check it out... ESPN Sport Science: Miguel the Masher - ESPN Video