Brooks, I'm mystified - mostly because I don't have a Trex or B400. You talked about using the Root of the B400 blades. would you please explain. And here's my reason for asking.
I was at a local sales and swap meet for RC stuff. My favorite LHS was there and one of the helicopter guys was demonstrating a B400 - but the blades were wrong. I asked and he was using the Align Fiber blade with an internal CF spar for stiffness. The flier liked the blades. Another more aggressive flier from the same shop didn't care for them. Being Fiber, they are more durable than woodies but they don't transmit shock into the helicopter like a CP blade does. I asked Michael to include a couple of sets in our package to the guys in Iraq. Then I found that they really don't fit the B400 well. I was afraid I messed up, but it sounds like the work around is straight forward using washers but is using the root of one blade type to mount another blade type something a soldier in Iraq can do?

The more information that I can send to Kenn before the package arrives the better use the guys will get from the parts. And if you would send it to my personal email so I don't lose it (this thread is HUGE!!) that would help me a lot.
Thanks a ton, (long, short or metric)
Soloboss