M_Boats: M17 venting question

As a follow up to my last question on the aft locker, has anyone installed a solar vent on their M17? If so where did you locate it? On top of the forward hatch? Would another alternative be small dorade vents either side of the forward hatch? Probably removeable with screw in deck plates. I am looking for ideas to keep the cabin fresh while stored. Let me know what you see at Lake Havasu. Thank you. Bill Wickett M17 #622