There is a fantastic company out there called Back2Base-iX that makes magnetic flight stands.  The stands are made out of durable acrylic.  The stands work using magnets to attach planes/spaceships/grav tanks or whatever.  You get 4 stands for $10.95.  What is great about these stands is you can use them for multiple roles.  Since they use magnets all you have to do use equip your spaceships/airplanes/gav vehicles with magnets and your ready to go.  This means you probably only need 1 or 2 packs of stands for all your flight stand requirements.