I’m having trouble getting control of PETG. I thought I had it dialed in, but curves ended up lumpy and stringy, while most flat sides do ok. Bed adhesion and layer-layer adhesion seem fine. Here’s my Quark holder. Brim detached. T did randomize the Z seam to hide it, but I didn’t see the print head crossing the print at the later changes. For comparison, here’s a part holder that three sides seem lovely. Printer is an Ender 5 Manual level Fresh Hatchbox PETG 235C , 240 first layer 0.2 thickness, 0.4 nozzle 55mm/s speed, half for bottoms, top, outer 0 fan on the Quark holder. 25% half way up the tool holder - didn’t seem to make a difference. Thoughts/tips? I like the way PETG feels. I’m annoyed by the lumps and strings.