You basically have to retune your profiles to match between the petg and the larger nozzle.
Recommend following this as well as you can: https://ellis3dp.com/Print-Tuning-Guide/
Oh yeah, and you’re going to lose detail with the larger nozzle compared to a 0.4 but it’s a trade-off
Honestly, get the flux and a hot air station instead, imo. Then again, I prefer being able to have control over where the heat is going instead of reflowing everything at once
Might as well add some picos to scratch that itch. And the rabbit hole that micro controllers bring… next thing you know, your work desk is also a solder station, a hot air station, PCB design, circuit design, and you’ve got two extra diy printers in various state of being built/rebuilt
I don’t have a problem, you have a problem
Saw the pics and it honestly looks like over extrusion, especially that top surface