Of course. I assume by the time you're at this level you understand the need for referential integrity - as you obviously do. Obi Wan has taught you well. I'm not going to take the time in every lesson to show you all of the stuff I've already taught you. Again. That's a lowly Expert-level concept. LOL. If the recipe changes, then what you require will also change. If someone changes it AFTER you make your shopping list, well, "dem's the breaks, kid."