The blade retention will be via a poly-C retention ring (it is shown in the renders). This is the first time that this has been done and we will make sure that it works well or we will re-design it to make sure that there are no problems!
BTW, we have 8 total. We need at least 10 to make this happen...so tell your friends ;D BTW, Yun...in answer to your PM question...we can make 2 happen for you if you want.