I love optional rules. Even ones I don't use. But this is one I really like.
Some people don't like the idea of subtracting SDC from armor. Finding it tedious to keep track of armor SDC, character SDC and hit point just too much book keeping.
So to eliminate one of those sets of numbers I propose to turn Armor SDC into Damage reduction.
Soft leather (full) AR 10 SDC 20 becomes Soft leather (full) AR10 DR2.
If an attack hits but rolls less than the armor rating than subtract the DR from the damage rolled. If the damage roll goes over the AR apply damage to the characters SDC as normal.
I'm looking at dividing the SDC of the armor by 10 rounded down to get the damage reduction value. Not sure if that is going to come out right. I'm going to play with the numbers and try it out.