Channel sized to your strip
Tell it the width and height of the neon flex you bought and the channel comes out with the right clearance, the wall at a thickness that holds and the lip that locks the silicone. If it does not fit, it tells you before you print.
The clearance that lets the neon flex press in without forcing it and without rattling.
Split for your printer
Pick your machine from a list of fifteen and it tells you if it fits. If not, you drag a plane and it comes out split.
Hidden wiring
Pass-throughs, tunnels between walls and conduits. It is what separates a 150 dollar sign from a 400 dollar one.
Diffuser cap
Internal, external or with walls. Plus the outline as an SVG if you would rather laser cut it in acrylic.
Mounts and ties, by dragging
Keyholes or tabs to hang it, and ties where the sign was going to snap. You place them on the 3D view with the mouse, not by typing coordinates.
Bill of materials before you print
How many metres of neon flex to buy, where to cut it and how many grams of filament it takes. Before you switch the printer on, not after.