One of the main reasons for having a Duel Head 3Dprinter is
working with soluble support filaments
Allowing, therefore, more complex shapes to be printed
I have always made difficult things to print
but the hardest to get a clean print from was
my MC Escher collection
for obvious reasons, there are so
many overhangs the printer even hates me for trying.

I have of course tried PVA many times
but always had issues with the first layer sticking
and the head clogging
and of course the lifespan of the product
being so critical to keeping is airtight
and dry.box..
well I hope you gain some insight as to how
to achieve a good print