Nozzles

Qidi uses their own nozzles, which are 2mm shorter than Volcano ones. You can use Volcano nozzle, but then you need to print spacer for probe and would be good to print new cooling ducts, so it doesn't cool down nozzle. Alternatively can cut volcano nozzle 2mm shorter
Triangle-Lab also sells adapter for Qidi. With that adapter can fit V6 nozzles https://www.trianglelab.net/products/adapters-for-qidi-hotend?VariantsId=11364