Something else that I guess is pretty much "standard fare" for Geminis.....

I intstallled two vents, intake mode in the master cabin and exhaust mode in the head. My rationale for putting them in the hatches was that the hatches were too weak for standing on, and the vents just gave me more incentive not to accidentally step there!

I cut the holes with a "spiral cutter" attachment for my Dremel tool (by far my MOST used power tool on the boat). The "spiral cutter" comes with a collar that lets it work kind of like a plunge router. It is great for cutting any kind of thin material, lexan, plexiglas, fiberglass, etc.

Instead of drilling MORE holes in the hatch to screw down the vents, I did the unthinkable..... I put them in with black 5200, and a lot of it. I figured that if I needed to replace anything associated with the vents it would be the NiCads or the motor or something, not the plastic housing. I have read all of the chatter about 5200 and it reacting with polymers, lexan, etc. guess I'll just wait and see. I do have to do something about dressing up the bottom, though.

******* UPDATE *******
18 months now and no indications that the 5200 is doing anything to the hatches!