Disenchanting Block

This "disenchanting" block is like a grindstone, but it has some differences. For example imagine you want feather falling on your boots but you get feather falling and fire protection. Just imagine you dont want the Fire Protection. What will you do? You will have to disenchant and lose your feather falling. Now using the "disenchant" block, when you put the boots you get the option of what you want to disenchant. You remove the fire protection, while you still have the feather falling. This will make enchanting easier and you wont have to spend hours or even days trying to get good enchants. You wont have to spend tons of exp just trying to enchant some boots.