The gilding system is really nice, I like customisable gear in games, but I have a few ideas for extend it to some more items. Namely belts. Pockets and Pouches are gild items that can be attached to various clothing items to add extra inventory slots for specific items. They would work just like standard gilds so you can choose between more inventory space or more stats. They also give belts an additional use for holding some of the pockets and pouches. I also thought of a few individual equip items that fill a similar purpose. This would also open belts to all other gild items. Multiple of the same pouch can be used to gild the same item at a decrease in gild chance.
Tool Hook: A 2x1 (wide) container for holding any tools equipable in the hand slots. I understand belts already do something similar but I think unifying that into this system would work. Fits onto any belt or coat.
Purses: Purses would come in various sizes from plain cloth up to silk and can only hold coins. Fits onto any belt.
Hidden Pocket: A pocket hidden deep in the folds of your coat, the item stored here is protected from being taken if you are knocked out. It can only hold a single 1x1 item though, so some more valuable things can not be hidden here. Fits only onto a coat.
Potion Pouch: A bag filled with tinctures and treatments, only medical items can be stored here. Fits onto a belt or coat.
Planter's Pouch: Can hold up to 1000 seeds to aid in planting larger fields. Fits onto a belt.
Arrow Loop: A strap attached to your backpack that can store a small number of arrows. Not as many as a quiver but can be attached to a leather backpack.
Log Pack: An alternative to the backpack which grants a large (6x4 wide) inventory in addition to the main inventory that can only hold wooden boards and blocks.
Backalley Merchant's Coat: A bulky coat that houses a number of hooks, pockets, and pouches that one might expect a "legitimate businessman" to wear while making his shady transactions. This coat has a higher than normal gild chance, but can only be gilded with pouches and pockets.
Utility Belt: This belt looks like something a rugged outdoorsman might wear. There's a place for everything! Has a higher than normal gild chance but can only be gilded with pockets and pouches.