Hi,
It is PLA, and it will be some loads on it. Approximatively 5 or 6 oranges for each paires of paralele stick. I will send pictures at the end of the project if you want it.
I'm not yet sure for the thickness, I will do some tests.
For the adherence, I got for my christmas the "CCTREE 3D Printer Build Surface" It is insaly adhesive, I don't use "skirt brim raft" any more.
For my part I could put the opening on the the top.
But I'm still wondering why I can't have this :
So I made some tests :
There is two factor here : the shell was the thing that prevent me to have the bridge over the wall instead of inside.
And the straight lines can be obtain by reducing my top layer height.
So I guess I can Close this topic.
Thank you for all those who helped me 😄