I've just put what I've done online so you can test the weight differences beetween the game and my page
(if you don't understand what I mean, read the last post)
some images are missing, it's because objects are in a .Pack.gbx and I still haven't worked on them ( but you can click on their names to add their weight to the counter ).
I will do it if someone find a solution for thosese weight differences ...
I don't really want to spend so much time on something that gives false results, and I really don't know what to do to make it work properly ... I need the real weight of objects
Strangely, after some tests, sometimes the game gives a bigger total weight and sometimes a smaller one.
As I show you what I've done, here are some little things about my tool :
On the left, the folder's names where Items are stored and in ( ) the login of who made the 3D object.
You have to click on the Icon of the Items you want to embed,
weight is added at the top right of the screen, if free space < 0 then the green rectangle becomes red.
then you can click again on an Icon to deselect it.
there are not enough items for the moment but if your window is small enough, you'll notice that you can see the rectangle with total weight and free space even if you scroll down

As you can see, there are some VioK's objects in ithere, and they are at the beginning of the page, it's because the game gives us items in reverse alphabetical order, so I did the same.
I will try to add a cool functionality (hope you like it^^) : the possibility to uncheck the objects that you don't have ingame, so you don't have to search what you need between items you don't have ( with about 200 ones, if you just uselly use 50 of them you certainly understand what I mean)
for sure I would like that my page remember the items you don't want to use and see, but don't really know how I will do that, maybe with cookies (never used that kind of thing so I don't know yet how it works) or may be keeping your settings on page's side, but then the page must recognize you ... maybe I could use ManiaPlanet's API, then I think I will need help ( been trying to understand it a few times but never understood how to make it work

)
but first I need the real weight on objects
Thanks for your help
link for the
page