Join a friend's Fleeca heist after completing it yourself?

[SoloRobar]

Since the heists have to be completed in the right order. Is it possible to complete the first Fleeca heist with a friend (as heist leader), and join another friend afterwards to help him complete the first heist?

Or do you have to complete all heists before you can accept someone's invite to join a previously completed heist? (When your fried is the heist leader)

Edited March 10, 2015 by SoloRobar