The hardware successor to UD3, by Thorben Zethoff (TMaxElectronics), a touring Tesla-coil performer in Germany. The PCB silkscreen credits the full lineage: "UD3.1c: Steve Ward, Jens Kerrinnes, Thorben Zethoff." It keeps the PSoC5 core and firmware base of UD3 (still Netzpfuscher's codebase), but the board is reworked. The voltage-sense amplifiers moved to a single 5V rail. A buck regulator makes VDrive adjustable 10-24V instead of fixed. The gate drive accepts a wider range of N+P FET pairs. Protection resistors are added in series with every gate and relay/LED pin, and the expansion headers get more supply rails. Almost all of it can be built through JLCPCB's assembly service; only the PSoC itself needs hand soldering. Three board revisions (1.1a/b/c) are in the repo, each with full Gerbers, BOM and pick-and-place files, plus an 8-page schematic PDF and a 3D STEP model. We have not found a photo of an assembled board yet, so this card is drawn from the schematic and the PCB render alone.
Schematics and photos
schematic overview (sheet 1/8) 
PCB layout render (UD3.1c)
Sources
This is the card from the driver tree, written from what the builder published. Send corrections through the forum.