Here is a Dualstrusion test in the form of a monogrammed trading coin for maker gear heads.
This is easily printed in two colors or one. The letter is raised so it will be visible in one color. A .dxf file is included to customize your own initial.
The Replicator code for merging files still seems to need tweaking as it is not clear why it adds opposite color infill which creates bleeding. I am sure this will improve as the community pitches in.