Perhaps I can help? I have recently started to use PETg for a project and must say that I agree with many of the post here recommending it as a material but I did find it was a little more difficult to get stuck to the Print bed than I thought it would be. I am using the Dutch Filaments premium PETG but know the Polish supplier Spectrum ( I love their low warp nylon). I am also using and Ender 3 pro I think the secret with pet is the print bed, I have used glass I found that it was difficult to get adhered put a thin application of PVA glue stick solved that problem. I have also used SRBP -Tufnol (Garalite in the USA) again I needed glue stick of 3Dlac to get first layer adhesion. I also found that it was necessary to make sure the print bed height is correctly set. After that I had no problems.

Setting
Print temp 250C
bed 70C
print speed 70mm/S

PS The part we printed last that way was a pump bracket base 40x60mm ht 45mm we have made about a dozen with no problems.

Good luck