Sorry I took a while to answer. So the salvage for thread recipe/action is skill based like as mentioned. The better your skill the more thread you get, each 5 sheets has the potential to give 10 thread units or one spool at master level.

The other recipes are all straight conversions. However if you merge thread to twine and then unravel the twine you will loose some thread. Right now it take 5 thread spools to make a twine. When you unravel the twine to thread you get 4 thread spools. I decided put in some material loss to prevent a player from master leveling tailoring from the same 5 thread to add some balance since each recipe gives some exp. Each disassemble recipe that grants XP incurs about a 20% material loss compared to the crafting of the item.

I like the idea of the recipe table BasicCrafting uses. I think I will plan on adding a detail section in a similar style.