Just question if it is disabled on purpose or it was just forgoton to be enabled ? Because in the prewios version we could used it.
Technically Magical Wood is pointless because we have paper and thaumium, this exploit that came with it had been fixed with the use of modifiers taken when switching out parts.
It was a bug, it was never intentional to let you add a modifier, use that modifier, switch out parts and keep what you added, then keep re-adding new modifier's. It's abuse of the system that was never meant to work in that way.