(Even for the LBODS that are like hat, tunic, pants, boots, you can use barbed exeptional leather to fill that deed. Yeah, the barbed leather is more pricey than normal, but it guarantees that every deed is usable. I think that holds true if you get a 20 normal leather 4x footwear (gives spined kit) deed.)
Is this the solution you are talking about? If yes, then what you are saying is (for example) if I have a LBOD Cloth 15 count that I don't need a normal leather 15 count footwear to fill it. I can use a barbed ex. 15 count to fill it.
If this is what you mean, then yes I know this. Also, it doesn't have to be barbed exceptional to fill it; as long as it's a higher level leather than the LBOD calls for.
If this is not what you meant, then I'm not sure what you did mean.
Edited to add: I just tried a horned SBOD with a spined LBOD and it did not work. But, the horned SBOD did work with the normal leather LBOD.