Why not add oak chips? Aren’t they a source of inexpensive tannin?
Oak chips are a cheap source of ellagic (wood) tannin. Though they may help to mask flavors, provide some oxidative protection and leave an oak finish, they WILL NOT improve mid-palate structure. By contrast, the combination of wood and proanthocyanidic tannins in FT Rouge or FT Rouge Soft will help improve structure and color stability.