Shield are tied to a power source and consume the same for damage.
Now there are cases where I would like to use a shield but want to transfer the damage and or damage consumption to the part's health or to a different AmmoStorage with a different damage exchange ratio which can be negative.
(The ordinary power source usually only serves to keep the shield up. Damage transfer may not play any role for this AmmoStorage.)
Shield option to transfer damage elsewhere
Why can't you use AmmoStorageProxy for this?