I have two 20-liter fuel tanks for the Kompress CH07 helicopter. The tanks are original and undamaged. I replaced them with larger ones, so I no longer need them. Maybe someone else can use them. I also have rubber connectors for the fuel inlet to the tanks, which I will include for free.
I can also exchange them, e.g., for a type S transponder, but a round 60 mm one, with an additional payment on my part.
Domasław, Poland 