/diy/ - Do It Yourself

I need your help, /diy. I have access to clay printer at my uni, printed and fired few test pieces recently. Now I want to print simple mug, but I need help with slicer settings to print pic related mug (fig 1). To achieve best surface, I need to use Vase mode in Cura, so nozzle is giving continuous clay noodle. Models must be solid to be sliced right in vase mode (fig 2), but I cant set up Cura to print shut mug`s bottom without printing bottom of handle piece (fig 3). How can I do this? Is there some g-code editors in which i can simply select handlepiece`s bottom layers and delite it?