Current text:
"Reach (Ex): One of an eidolon’s attacks is capable
of striking at foes at a distance. Pick one attack. The
eidolon’s reach with that attack increases by 5 feet."
Lets say my Eidolon has 4 tentacles. Does taking reach mean all four tentacles now have reach or one has reach and the other three don't?
For comparison's sake, the wording in Imp. Damage and Energy Attacks are very explicit whereas the wording for reach is open to either intepretation:
"Improved Damage (Ex): One of the eidolon’s natural
attacks is particularly deadly. Select one natural attack
form and increase the damage die type by one step."
"Energy Attacks (Su): An eidolon’s attacks become charged
with energy. Pick one energy type: acid, cold, electricity,
or fire. All of the eidolon’s natural attacks deal 1d6 points
of energy damage of the chosen type on a successful hit."
A line to clarify this in the reach description would be useful.