There are 2 item vaults that drop quartz and diorite for mechanical mixers, but you only included a mechanism to eliminate excess quartz in one of them, it is also necessary to include one for the other so that the farm does not get stuck. Due to the lack of space to collect quartz from this vault, I used a scheme with a mechanical belt and an encased fan as shown in the image I listed in the following link.
https://drive.google.com/file/d/1KOtt_RZIpt4kSi8x7Qjg_1s6VA5rxSad/view?usp=drive_link