Another way to handle inventory space in Stormblood?

[lujate]

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It shouldn't take any more database resources going from 99 to, say, 250, because generally the smallest variable size used is 1 byte. But any more and you'll need to expand the size of the field in the database that keeps track of stack size. That's for every inventory slot, for every player/retainer, not just once.
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It's possible (but I'd imagine unlikely) that the DB column is numeric (2), which would cap out at 99. The variables in the code could also cap out as small as 127.