Let's see, the original Ramtec was 9 blades, now it's 11 blades, or is it 12 blades? Sounds like 3 different blade designs to me.
Proof of the rest is out there on the web. Do you really want me to dig all of the complaints up and repost them here? Sorry, I've got better things to do. Like run my 22s Dynamax that produces 34lbs of thrust. That's 15kg btw.