Don't know about the windows..
but don't use one of those spring loaded, cuts of fuel to the carb when you fill fuel dots...they leak air after a short time and you'll have a dickens of a time finding that leak..(dickens of a time? ) just get a fuel dot that is a fitting, where the fill line passes through the fitting and is held in place by a stopper and friction. When you want to fill just remove line and stopper.