How to make bags bottomless

Hi,
I got the scroll case from Firebead. It is bag03.itm. It currently only holds 20 scrolls. I searched around with Near Infinity and the only thing I can see that's might be linked to this is a store file bag03.sto. I changed the capacity in the sto file form 20 to 200 but this had no effect on the scroll case when playing. Did I miss something?

thanks