We moded someone else house rule for Predator, and it is my favorite house rule I have seen. The original is not to allow Predator to be taken, but once you earn Ace against a ship, it is built in vs that ship. Ace requires 5 kills, so kill 5 TIEs and you get a free Predator against them, but not other ships you have not earned the Ace title against.

I like this. A lot. I keep forgetting to bring it up to our group.

Agreed, this is awesome and it really makes it worthwhile to fill in those little kill-counters on the pilot cards.