Okay, I'm thinking the following:
- Toughness Bonus does not reduce damage.
- Characters do not have Wounds at all. Wounds are no longer a thing.
- Damage dealt over one's Toughness bonus causes a Critical Effect equal to the amount it exceeds it by.
- Armour Penetration completely ignores armour equal to that number or below, but has no effect on Armour Points higher.
Damage and Penetration would need to be changed for many weapons. Getting on that now.