There are several levels where you don't get a new recipe, plenty of room to put in Infusion removal by level. That being said, SI is a different type of infusion and in cost not as valuable as doing Aug\Trans. Make SI it's own art, 1 Infusion per piece whether or not the item has been Auged or Transed, but it makes the piece attuned. Still sell-able, but if someone wants the piece thy have to get you to remove the infusion. This way you can still get the bonus, but you have to go through the pain of learning SI for yourself.