Weapon Katas for Martial Arts

In my mind it seems to be simple way to implement this with kata-weapon drop down menu, where one chooses any weapon and FG calculates all damage modifiers for AT 1 through 20 (from MA and weapon max damages) and subtracts 20 from OB. One then has to only add appropriate additional crit with -1 mod.

Weapon restrictions and OB 50/90 restrictions can be left for GM to monitor.

Yeah, simple thing in my mind. Maybe not so simple in FG programming.