Hello everybody,
I present you the "Tintin Destination Moon" item set, composed of 2 items : the rocket and "the rocket elevator".
I used the "Mountains, Hills & Plateaus" item set made by niZe to present my item set (link: https://item.mania.exchange/set/view/10786).
I used the open planet plugin named "All Decoration Unlocker" made by Greep, to be able to create the presentation map without the stadium. (link: https://openplanet.dev/plugin/decorationunlocker)
I also use the open planet plugin named "Screenshoter" made by fentra LABS. (link: https://openplanet.dev/plugin/screenshooter)
Special thanks to the Trackmania Scenery Hub community, helping me to learn 3D-modeling & improve my items.
Have a good mapping!