This airport is my first attempt ... it should work with RF 4 thru 5.5 ... My concept is that basically it's a competition Dome that you can customize further by using your airport edit function to populate it with buildings, trees, clouds etc. This Dome is really large. This airport is especially good for those who have not experimented in using the "Airport Edit" utility. Be sure to read your RF help info on using the "Airport Edit". This airport is kinda like a base to build up from, so experiment in designing.