

I started up Reddits functional print many years ago to serve as a gallery/showcase to inspire others that 3D printing has a lot of useful uses.
I left Reddit with the Exodus, but I believe it still exists, although it’s probably bot filled garbage now.
But it had a huge list of useful things.
I have a similar thead here on the fediverse, but the original site (kbin.social) died out and I haven’t bothered to get another going.

I’ve never tried this, but if what people say in this thread about how PETG doesn’t bond well to PLA,
Then you’ll definitely need to adjust your Z-Interface distance between support and bottom layers. The default is likely too much of a distance.
I don’t know what your slicer setting is called, but in PrusaSlicer its called “Top Contact Z Distance” in the support settings, and when it comes to PLA vs PLA, it has an extra 0.17mm distance added.
If I were you, I would try 0.05 or even none.