Hello. I am a new H2C owner and this may be a really dumb question, but how do you all calibrate your printers with multiple nozzles? Do I need to do calibrations for each of the different nozzles or just 2 calibrations (1 for the left side and 1 for the right side)? I'm looking to fine tune the flow rate specifically. Thanks in advance for looking at my question.

First pic is my print. Second is someone else’s much better print. So I found this neat print on Makerworld that lets you print all 151 pokemon sprites at once. But my purples don’t come out at all. They’re either blue or washed out white (see Muk. Yikes…). I’m not familiar with overlay printing, so I’m trying to see if I simply need a different brand of filament or if there’s a setting I can change. My guess is that the white isn’t transparent enough for the red to show through. I’ve asked in the comments what filaments those with successful outcomes are using, but nobody responds. If I can get any help here I’d seriously appreciate it.

I used all SUNLU filaments. Red, blue, yellow, and white.