wrote...

The stated purpose is a poor idea for doing that in the first place. The
two
crew on deck that you stake so much faith in, are admittedly
inexperienced
sailors. There is no way to forsee what situations they are capable of
dealing
with. Meanwhile, they aren't really gonna learn much about spinnakers this
way
any how. The whole idea is a non-starter.

Not according to those who said they've done it successfully in the past!