Custom printer definition: my 100x100 build area has a 3mm grey border

[lordnimon 1]

I've created a printer definition for my old Printrbot.  The print area is 100x100mm.  However, in Cura, there appears to be a 3mm grey border along the edge of the print area, effectively limiting my print area to 94x94, or maybe less.

 

How do I tell Cura that I'm not lying when I say my print area is 100x100?

[lordnimon 1]

I figured it out.  Even though I have "Build Plate Adhesion" unchecked, I had to go into Custom settings and change the Build Plate Adhesion from Skirt to None.  Is this a bug in Cura? 

[ahoeben 2,010]

If you disable bed adhesion in “recommended mode”, Cura will print a skirt (instead of a brim). A skirt is often recommended to make sure the extruder is fully primed before printing the model.

 

”It’s not a bug, it’s a feature”