I have some simple GCODE modifications in my printer profile, but they cannot be used in Handy. This makes sense for PUBLIC models, but I would like to use my profile for my PRIVATE models. This would enable me to print my models with my profile remotely.
I don’t print from MakerWorld, so I don’t know for certain that this works…
Try saving your printer profile as “Preset Inside Project”.
I think that will place the printer settings inside the .3mf instead of reading the profile from your computer at slicing time.