Hello, I am trying to print a key chain with one color for the base and one color for the letters (using a post-processing script: filament change).  To have better layer adhesion, I would like to have the top layer of the base be complete and the bottom layer of letters be complete.  However, when I try to slice it, the slicer continues the void into the letters leaving only the edge of the letters bonding to the base. Are there any slicer settings or model changes I can make to print it the way I need it to? Thanks!