Here are a few pics of my most "confused" 450. It doesnt know whether its a Align Trex or a Exi, or what.

This perticular one started as a Exi 450 kit....the $29 one.
Its been in a few mishaps, and I just tossed on whatever part was available at the time to get it back up and running. So it has a wide variety of mixed up 450 parts just to show how compatible they are.

The head block is Exi,
The mixing arms are Exi.
The Blade grips???? I dont even know what they came off of.
The swashplate is Align
The flybar paddles are Align
The main shaft is a MX400...LOL I had a surplus of these from back in the day...so I just keep using them.
The frame is Exi
The tail boom is Align
The blades are some cheapo $17 carbon fibers I picked up at Hodges Hobbies.

It flys just as well as any of the other 450's I have.