Hello Donkya

Please increase the use of wood.
Since iron becomes iron balls, I think it's okay to change wood into wooden balls.

This will definitely eliminate the frustration of lumberjacks.

こんにちわ　どんキャ

木材の使い道を増やしてください
鉄が鉄製の玉になるのだから木材が木製の玉に変えられても良いと思います

これで木こりの不満も解消間違いなし