Walls are inset- any idea?

[ssashton 2]

In this model there are some small lines that link the two parts to help keep them stable. When I slice it, it makes the outside wall smaller. I don't know why this is happening.

 

This is using the AnkerMake M5 profile. If I use a Ender 3 profile it does not happen.

 

Any ideas?

 

AM5_Port Bodies Main.3mf

[Cuq 173]

It's because in the Standard Profile of the AnkerMake M5 the Hole Horizontal Expansion is set to 0,2. Each time you have these tiny links then the inner wall are considered as a hole (Closed section) Then you get this 0.2 offset. Change this value to 0.