[sorry in advance for what I'm sure is a well-worn topic; couldn't find this specific question in the archives]
I picked up an inexpensive rear camera on eBay, just to figure out how badly I need/want one of these things. With some posts talking about how tricky it could be to remove the half moon, I'm wondering if anyone has any experience with installing a camera WITHOUT removing the half moon at all? The camera has several adjusting rings, so it wold seem all I would need is a round hole to insert it and tighten up. Possible? I haven't looked closely at this area in a while. May be difficult to seal up weather tight this way?