Brett

Did you flip the ribbon cable and try?

In the Marlin file pins_BTT_GTR_V1.0.h, the third driver pin definition (i.e. Z) calls for #define Z_DIR_PIN PB7, but calls for PC7 in the GTR V1.0 Pin.PDF. Which is correct? Can...

how many Z motors are you running? I have 3 so it warrants asking. I had to put the probe pins in the Z min position and not the extension...

> I think it had something to do with the DIAG feedback from the 2209s. It even with 2208s I cannot make this board home with two z drivers. I...

> That new dependencies is a bit cumbersome. It shouldn't be needed... For the meantime, you may have to install zstd with homebrew. [execute this command](https://formulae.brew.sh/formula/zstd): `brew install zstd` worked...