In my ongoing effort to improve the ventilation in our little IP, I was thinking about adding a solar vent. I figured that would keep a flow of air through the boat when we weren't there and add another source to vent the boat when it's raining. Is there any disadvantage to mounting it on the forward hatch over the v-berth? I suppose the small hatch over the head is also a possibility? I'm concerned about cutting through the coach roof, not having an exact wiring plan or knowing the thickness of the roof and liner (I assume there is a liner and that I'm not looking at the underside of the roof).