prefabs don't work properly

[cancer352]

For aircrafts there are old and modern runways. When I save an airport with modern runways to the prefabs and load it for use I get back an airport with old runways, but have to pay for modern runways - so I have to upgrade the old runways. That means I pay twice for the same runways. That can't be right.
Isn't it possible to get that back what you have saved to the prefabs, especially to get back modern runways when you have saved modern runways ?

[WalkingWad]

Each prefab (Stamp) contains only paths, not its type. When you build any stamps, you may select the Options tab in the Stamp window to select which type of rails/roads/airport path you want to use (same for types of bridges and tunnels)
(for example, you may create an old type of airport and then build new types just by changing a type in da Stamp window)

[cancer352]

Thanks, that has helped. Now I get my favorite airports just with 1 click (BTW: First I didn't know that airports are such expensive, but now every of my city has one). Aircrafts are great !!