MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Enter your letters in code but you also need to add the write.scad file and others addons into your working folder. Find them at https://www.thingiverse.com/thing:16193.
And only use OpenScad 32bit.