So lets start. First I needed to add the landing gear and although it wont be animated just yet, I hope to add this feature in the future. Here's a screenshot of the landing gear in my editor : https://gyazo.com/d1b7ca0bb54e886fb1c389aa0c98cf9e

Im trying to make it so it balances well ingame and trying to stick as close as possible to the original model

After the OBJ exports for the landing gear are ready to be converted into a special format, Im converting the textures into useable formats that the game understands : http://i.imgsafe.org/7313b41.jpg

So now im converting the models into a format that will be complied into the gmod default model file which is MDL : http://i.imgsafe.org/f6078b5.png but first im assigning the materials to the models + exporting its collision model

Landing gear models have been converted :) : http://i.imgsafe.org/092882d.png
I just have to test them out now

Done :) https://gyazo.com/f61d43683246ca6687071e3df0180951

The material error is fine, I was just testing the models size proportions and so on but for now I can add this to my addon and start coding the rest.

Sucessfully imported : https://gyazo.com/443e94472a421a294ebe7d78721f1e55

Now all i have to do is sort out the position of the legs form the code I put in eailer and a few other bits and bobs

After realising I'm a idiot, it would have been easier to use the landing gear and the body as one mesh, and so Im having to recompile everything, fun!

Sorting out the collision model now : https://gyazo.com/7c09401b86414692f475530e9da72490