"Second, is there a setting so that the outline walls are built OUTWARDS instead of INWARDS? I essentially end up with a hollow print where the inside is actually smaller than it's supposed to be, since the slicer set up the walls to go towards the inside. I'd like to have the walls built outwards such that innermost wall should be the correct same size as my model, if any of that makes sense."
I'm also looking for the answer to your second question - wondering if you managed to figure this out?
Thanks