Joseph Smith's Use of the Book of Mormon

Joseph Smith doesn't even invent this idea of a second set of plates until after he restarts the Book of Mormon to backfill the 116 pages. Joseph Smith did not really think of the idea of small plates until after that and he's trying now to basically backfill and solve the problem that was created with the loss of the 116 pages so I don't want to throw you under the bus again from a write up on lectures on doubt but in reality it's Joseph Smith thinking about it as he's trying to figure out how to complete the Book oformon after losing those pages.