That's funny because the way I learned it was we need to verify proper functionality before each upgrade. The pause right now is my first go at SPI stepper drivers. Everything works and great with the tmc2208 or lv8729 but when I put in the 5160's and set them up for spi I can only get the first 2 axes I use to work and then the rest either micro step or don't move at all? And if I shut it down and restart again the first 2 axes I use will work but the others wont? I am lost on this and will likely go back to the 2208 until I can at least find some help with this. Don't you worry about that iris box. It is coming.