Few Questions

In the ff3usme item editing there is the heavy gear check box i figured was for the merit award and to exclude certain people from using gear unless they have that relic.  But it seems like every piece of gear has that checked so i obviously don't understand how that works.

I have seen several tintinibar hacks and am not sure what that means to me For instance Unhardcoded tintinibar by Lenophis says
Unhardcodes the Tintinabar to no longer be exclusive to a specific item.
You have a choice of keeping it to a single party member, or to go with what
the data slightly suggests and make it a party-wide effect
So does this mean if i decide to get rid of the tintinibar i need this hack to do so?

Also how would i go about denying certain chars espers or would it be easier to change esper spells and have items give spells to the people i want learning and not others

Edit Additional Question I am trying to go through and weed out hacks that conflict with one another and i am trying Half Health Warnings Resilient Morph Runic Forever Step dance True Duel and Possibly Unlimted espers all by and they all conflict with one another i can use any single one but none together is this just a false positive or will they really break stuff they also conflict with the condense spell list and ultimate damage fix hack the condense spell list can be done without but ultimate damage seems pretty dang important