I am pretty sure the materia bag would be an issue due to server restrictions. That was always the case with XI for storage and I am getting the same impression here. they can't(guessing) or is very hard to create another seperate inventory that does not count towards main inventory. That being said the one Materia to repair everything that rank 1-5 covers now would be awesome. Got my vote. I am guessing again that it will not be an issue in 2.0 because it looks like we can carry multiple different bags, probably of different sizes.