Ok. So I've watched Imeo's video a few times now and I still can't seem to find any mention of o ring placement for dripping mode. I've got the small base out of its bag and the drip mouthpiece. Also found the knurled thinner nut to thread around the ceramic holder. What other pieces do I need to install? Does the o ring around the bottom center post need to be changed? What about an O ring that would fit between the base and the mouthpiece?