Sickles would be amazing to have in this tbh, especially if you need alot of the same seed. So, it could work like this, When you have a fully grown plant and use a sickle, instead of harvesting the plant, you would only get seeds, like 2-3 seeds! It could use 8 Iron bars, 25 timber, and 1 string, similar to the hoe, since a sickle is similar to a hoe, but it has a much longer curved end thats sharper idk, just a idea