That's kind of why I pulled the trigger on the aluminum kit, it's been out for a couple years now with mixed reviews. I haven't seen anyone actually sit down and document what all is good, bad, and ugly about it.
So far I think it looks pretty good, the casting itself is a little bit boogery but the piston coming with it looks nice, and it has that same port layout as the OG mk65 so it should be a ripper.