Before I fly some ones (AKA test hop) aircraft I give this disclaimer:

If you built this aircraft correctly
If you set up the engine correctly
If you charged the battery correctly
If something does not fail in this aircraft.
If every thing is right.

I can fly this aircraft.

If not this aircraft may be lost.

Now do you want me to fly your aircraft?

But in lieu of the resent events it may be that a 0 liability contract is needed.

Johnny