The seller uses L-connector (5C, GND, D In/Out) to allow the unit to stand on the four long screws (to protect the capacitor). I found out the advantage of the L-connector after I purchase the 3-pin connectors. Without L-connectors, the display unit could not be stayed flat on a table. The seller assumes that buyers of his product are electronic wizards. Now, I have to find a way to make these display units look good.
Like the Nixie Tubes this display is modeled after, Lixie is a *part*, not a product. It wasn't designed or sold as a standalone device, it needs something to drive it, and something to house it, just like Nixie Tubes, 7-segment displays, VFD, or any other numeric display parts on the market. While it is an option to the user, I don't use right angle connectors for my displays at home, they are soldered pins. The four screws on the unit are not for standing them up on their own, they are for mounting to a surface/base/enclosure such as this one: https://imgur.com/a/6soGR
For making your own enclosures, the dimensions for the whole unit (including laser cutting files to outsource the work to companies like Ponoko) are located on the Lixie's Hardware GitHub repository here: https://github.com/connornishijima/Lixie-hardware
I don't assume that my users are all engineers, though I'm not sure how to simplify the design to need less than three wires to control any number of displays in any brightness or color, with one-liner style code. As far as enclosure designs, I'm always available for collaboration, such as this oversized base that was commissioned by Blizzard Entertainment for their Irvine office to track the number of messages sent through their recently launched Battle.net mobile app: https://imgur.com/gallery/mRSaP
Also, for any Tindie employees auditing reviews, this review was rendered for my devices as 1 and a half....and a half stars. This doesn't look right: https://imgur.com/a/YE7nT