the z pinned toothed idler calls out m3x13mm pins but uses 20mm pins <img width="2562" height="1259" alt="Image" src="https://github.com/user-attachments/assets/e1099bae-73c4-418c-9fee-2ccc5777e8d2" />
the z pinned toothed idler calls out m3x13mm pins but uses 20mm pins