Cuzza is way ahead of me on this project, but after coming to the same conclusion about the domed top about 6months ago, I built a replacement for my Reef Octopus that had a domed top, but due to extreamly tight clearance under my stand (i have about 1/2" between the top of the skimmer and the bottom of the tank, I built a gear to press on the OD of the lid, the idea is to drive the gear with a small motor plugged into a simple timer. The two stands or pillars are there to mount wipers that wipe the neck. The who thing works amazingly well, but Cuzza's wash system is where my system is way behind. Just thought I would share some pics. All these parts where printed on a 3D printer in case that wasn't obvious.
https://www.dropbox.com/sc/05ip0q34mzyiz8c/AAAYcBFcadmrI_D1evzSnaB1a link because for some reason i simply cant post pics on this forum.