Well personal perspective...
I donated...when then it was time to shunt the donation to Neo UG ...I figured I wouldn't wait for the transfer...donated again to the new structured neo UG and not long after my original donation caught up and both were merged...makes the final price tag a wee bit less.
I was debating (internally) getting 2 full units...or 1 full unit and a board...or simply 2 motherboards (cheapest option) ...I was concerned the same as you my good sir...redundancy...guts-wise little will be different shy of the board. So spare n900 parts may do the trick. I think if the need were to arise for a replacement motherboard...subsequent 2nd and 3rd production runs will accommodate. I don't believe this is going to culminate in a one-and-only run. Once the neo900 is distributed and in use...more and more people will want one ...desire is a powerful thing.

I am sorry here though...I will have to laugh....loudly...
Hhahahahahaha!
An "orphaned" neo900 going for cheaper because no one stepped up to claim it?
That is funny...
naw...I 'm sure the very next person in line who wanted one but was too late for the 1st run...will get 1st dibs...if not interested...then the next person waiting for the 2nd run will get their shot at the wayward "orphan". Doubt there will be a crumb on the floor...except perhaps motherboards that didn't work out...with flaws...wifi doesn't work or bluetooth...or something. I do know "my" neo900 sure isn't getting "orphaned". Not unless Hell itself freezes over and Lou himself puts on his ice skates and does a complete one man reenactment of Will Ferrel's "Blades of Glory" ...so yeah...And I'm pretty much positive that 99.9% of the other donator/ investors are of the same mind.