Smart Objects in Pyxel Edit (or something similar?)

Hello!
Just purchased the software, and I really enjoy it. I enjoy it so much that I actually want to use it instead of Photoshop.
However!
I have this problem where I need to use smart-objects (linked objects: where when you do some changes to the one object, it gets autoamtically applied to the other linked object) but I don't find this feature?
Or maybe it is another way to "fix" my problem?
You see, in my game, I am painting different character-equipment-items. I do this by painting the equipment over my main character. But due to the setup in my game engine I have to split/save all of the different equipment items to individual image files (so none of the items overlap eachother).
And by painting only on the individual image files, I have no idea how the final outcome will look (when the gear is on the player-character). That's why I used SmartObjects in Photoshop, because then I could just paint the gear on the character, and then I had a smartobject on the side that saved the image seperated from the other equipment-images.
So please, anyone have any tips?
regards,
Simon
EDIT: Or maybe it is possible to use tile-set feature in Pyxel Edit for this? Only problem for me right now is that my equipment-images are not of the same size (smaller for the head/helmet, and bigger for the shield for example).
Comments
I will try your setup as I think it will work. I just have to reposition some of the original sprites so there wont be any placement problems inside the game
Thanks again will tell you the result
I have every gear-piece centered in each tile in PE.
But I use Export Tiles in pyxel edit, as all the sprites are centered in each tile.