for most cases, the smaller needle and tip set will be just fine. Perhaps for Dope you MAY want the larger one. In most cases you will be able to make the small one work with a slightly higher reduction of your material if needed. For spraying pearls in clear, I dont beleive that you will need a larger tip. I have sprayed lots of pearl through my Sata Minijet ,it has a small tip. In actuallity, the smaller tip generally will atomize better and make it easier to get even coverage with the pearls or candy for that matter. I would make a small reccomendation with regards to pearls. It is much easier to build them up on light coats, and make sure that you have clear with NO pearl over the top of the clear with pearl. If you dont, you will polish the pearls and they will tarnish.