1. What version of ACE does this work with?
Any pre-rewrite version like Legacy ACE or ACE3 - Legacy Medical Module or even Cobalt ACE. This does not work with Indigo ACE or the most recent version of ACE3.

2. Does this work without ACE3?
It should but I don't bench it with the vanilla medical model. I 100% strongly recommend you use Cobalt or Legacy ACE.

3. Does this work with VETERAN MOD?
Probably not.

4. Will this eventually work with the latest version of ACE3?
Indeed!

5. Why are there so many plates and panels?
One of AAPM's goals is to document all the plates and panels of the world so they won't be forgotten. What you're seeing is the largest documented set of body armor inserts ever assembled.

6. People seem really tough with plates!
Yep. Blunt trauma is really overstated in mainstream media. Plates do their job super well in reality. I recommend using armor-piercing ammunition from Universal Ammo System to bring them down. Keep in mind that not all APs are the same, and some will pierce plates better than others.

7. What's the best plate?
Depends on your needs. The NIJ-VI Ceradyne 96034 and the NIJ-VII Diamond Age N3 are hard to beat, but they won't stop .50-caliber rounds like the NIJ-VIII models can.

8. Why doesn't stuff fit in the inventory? The plates are heavy!
Plates are realistically weighted for a full set (indeed, one plate in the inventory counts as front, back and sides) so you'll wanna use Simple Inventory Overhaul to beef up your loadout space.