1) With Droids do Built in weapons and equipment count towards Droid's Encumbrance or would they be treated like worn armor and have 3 Encumbrance removed since they are Built in?

2) When Modifying Weapon Attachments that have Set Back under Base Modifiers ie Augmented Spin Barrel and Blaster Actuating Module do the Set Back increase as Mods increase damage or does the Set Back remain the same?

3) Is there a limit to how many minions can be in a single group?

I'd think the setback stays the same. While I'm sure one could make a good case for why it should increase with damage, I think that one setback die is enough of a drawback. It doesn't say anywhere that it should increase, so to me that means it doesn't.

After rereading the rule on minions it does not state a limit to how many can be in a group. I only say be reasonable. For me throwing more than 5 in a group is torture enough for my players.

The devs said they capped attributes at 6 partially for dice pool size mitigation. I'd follow the same rules for minions, no more than 6 per group.