The whole point of ficly is writing sequels. You don’t need to ask, just write if you want to. Though I’d hope you were keeping track of the story thus far. :)
As for THX: nice sequel. It reminds me of what Raymond Chandler used to say about writing—whenever he got stuck, he would have someone come through the door with a gun. This seems to be the same in principle.
Thiefree
Robotech_Master
Blossom Ruoquen (LoA)
Ridcully Calvert