The Drengin have set up an influence starbase about 4 squares/parsecs from a morale resource, which makes the morale resource now located inside their influence but nobody has claimed it. It's pretty far from my space but I have a constructor nearby. If I try to claim it:

1) Is it ok to set up a resource starbase within 4 parsecs of an enemy influence starbase?
2) Is it ok to set up a starbase inside enemy "territory"?
3) If so, could my starbase be vulnerable to "flipping" over to the Drengin?