When I first got my trident 4 months ago I 3d printed and used the needle guides in each of the reagent bottles. When I first printed them I assumed it was to make sure I got all of the reagent out of the bottle, but now that I've replaced the reagents a few times I always throw away a decent amount of reagent, probably about 10% of the bottle. So is there a point to use the needle guides? What are they supposed to do if not help use all of the reagent?