Ciao viljmak52,
nice to meet another Felix-user.
From my last message left here KS has become my standard slicing software, most of the times I have been using beta versions downloaded from here for dual extrusions, sometimes switching back to the stable version when I see some slicing mistakes.
I have tried PVA too from formfutura but didn't have any luck yet, maybe because there is too much humidity in the room. I will try to dry PVA filament in the oven at 40°C and give it a go again, but next try is flexible material!
Take care for now!
V.