Nice, does it seem like the layers stuck together correctly? I thought that PETG liked temps up around 240-250c.
I’ve been wanting to try flexible filament, but from what I understand it can be difficult with the bowden style extruder, so I haven’t attempted it on the CR-10.
Regarding the nozzle, those ruby ones look pretty good, It’s a lot to spend on a nozzle though.
I’m currently in the process of making some that, in theory, should be almost as good as the ruby in wear resistance but at 1/3 the price. I have a shipment on the way of some special high temp tool steel. Probably won’t have a finished product until early next year once machining & heat treatment are completed, but I could send you a prototype for testing once they are finished.