Customizable Stereo Text

Inspired by the Markus Raetz Yes No sculpture, and the Mojoptix digital sundial, I whipped up this customizable OpenSCAD script to take the intersection of two text extrusions.

These are very difficult to print, without care. Any support whatsoever and you will have a very hard time getting it out of all the crevices. You will want to use dual extruders with dissolvable support. Just browsing through some of the remixes people have published using Customizer, I can see that some are impossible, and many are dubious. Good luck!

For best results, stick to all capital letters, and letters which do not require support.
These letters are fine: AHIKLMNVWXY
These may work: BDJOQRU
The rest are problematic: CEFGPSTZ

Lowercase letters are hard, because they have a lot more overhangs, they have descenders which will not appear, and they can have disconnected floating bits, like the dot of an "i". If you mix uppercase and lowercase, an uppercase letter in one direction may have parts