Windex is helpful to determine wind direction with a glance. Suggest removing the wings on the windex as they are not really helpful to most of us and can end up misaligned or not calibrated for your boat anyway. Anchor light on top is necessary. Many sailors do not use anchor light when in a rented mooring field, but I find it particularly useful then when trying to locate my boat from my dinghy or even a launch taxi on a dark moonless night in a crowded field. VHF antenna and wind speed device, if you have one, also need to fit up there. No need for lightning repeller brush, use magic spells instead and just as effective. Give some thought to birds landing up there and damaging things.