The Starforge text preview should accurately preview text with at most one alignment mark.
A good way to overlap is the following:
[Color]Text[Right-align mark][Color]Text[Invisible color mark][spaces, commas, and periods]
Adjust the spaces, commas, and periods until it looks right in Starforge. Commas are one pixel bigger than periods, so you can adjust the combination of them to get the spacing exactly right.
Moving to MMA.