I ruled the reward of Securiy Droid but got not the 30 parts to unlock them. I have only 10 parts now. The Security Droid was the only good thing in that event, i got the AT-DT Walker with HQ 5, i have HQ 7 now, and i never used them and want not use them, to high Unit Capacity.
I got most Matches 0-1 Star, with many luck 2-3 Stars, the rewards are a joke for that.