Guess I'm the only one that can't interpret rules since no one else seems to have asked this.
What are we supposed to do with the SB number?
Does it modify the modifier or replace the modifier?
Example: SB rating of 0 makes the -4 a 0 (replaces) or the 0 gets applied to the -4 so still -4 (modified)?
And what is Other trying to tell you?
This is for forward compatibility with MBT (second edition).