That makes sense. Personally, I just assumed the only items that took up slots were the 2 bundles of small objects (torches, rations), so starting at 2 tracks with that.
This is a great tool, but I do have one question: How did you come up with the number of slots being used up in a character's inventory? The game starts PCs with a couple items, so which ones did you decide were the ones that were going to take up a slot?