WoW I didn't know that...thanks mateThe 2 things where the arrow points. You raise them up to close the flow off for thinner juice. Most people have them wide open, which is how it comes by default. If you haven't adjust them, taking them out won't do anything to increase or decrease the flow (maybe a slight increase).
Notice in my photo that they are removed. If you position the Xeta this way with them in, you will probably scratch your glass.