Hi Quinny, I probably saw the same post, that’s a great project. In some ways, the SmartLED Shield V4 is better for this project than the SmartMatrix Shield V3, as the shield can plug directly in to the LED Matrix panel without taking up as much vertical space. If you use a ribbon cable, that connector is always going to be fairly tall when plugged in. To get the shield as low profile as the other guy did, you’d have to desolder the connector on the panel, and solder up a bunch of jumper wires. It’s a bit more difficult and probably more fragile, but can be done. Changing from the Teensy 3.2 to the Teensy 3.5 to get the microSD reader shouldn’t be a big deal as it’s vertical space that’s at a premium in this project, not horizontal.
If you absolutely need to use the Teensy 3.2 with separate microSD card reader, you might be able to find some old stock of the SmartMatrix Shield V3, I made a note here about where to look.
I don’t have time today to take some measurements and pictures of how tall the panel is with the SmartLED Shield V4 plugged in. If you make a new topic about “LED GIF Graduation Cap” or similar, I’ll write back when I have some more time.