Ok lets see if I can describe this accurately without whipping out my drawing pencils. If you have a square block of eggs (like 2 18 egg cartons together or an egg flat), you would move the block from one corner to the next corner causing the fluid inside the eggs to shift a complete 360˚ after a full rotation. Now because you admit that you are OCD I know that that is not going to be enough (I have a touch myself). You are not going to come close to being satisfied till you get an automated turner. Now you might not get it in time for this hatch but definitely make plans for one. And remember even good broody hens don't hatch all the time at 100%.