Great Cave Squig, Roving Goblins

By In hoc signo vinces, in Warhammer Invasion Rules Questions

Question 1:

If a have a Great Cave Squig in zone where I have a development, when the Great Cave Squig's forced ability triggers, can I chose to deal damage to a unit I control or is this option only available if I have no development to sacrifice?

Question 2:

Can Roving Goblins be scent on a quest where a unit is already questing? (Considering it is the first Roving Goblins I play)

Thanks for your help!

1. The card says "OR" so you may choose.

2. To my understanding of the rules their effect works only once they are in play. That means you can't play them on a quest that already has a unit on it, cause when you play them you would NOT be allowed to play a second unit on a quest.

1. Faq says :

The Word “Or”
Some card effects present the players
with a choice between two different
card effects. These choices are denoted
by the term “or” in the card text. A
player can choose which of the effects
he wants to resolve. However, he must
choose an option that he can resolve
completely.
So Runenstahl is right
2. Same answer