I just started using KISSlicer some days ago and after watching YT videos and some hrs of experimenting I could create better profiles for my printers than with so much work in other slicers.
I still have to learn a lot, but seems I've found my favourite slicer

The only thing so far I could not figure out (or just cannot find) if it's possible to tell the slicer not to build supports inside the model (only "touching buildplate").
I'd like to print a layer fan duct (https://www.thingiverse.com/thing:2850837), but KISSlicer always wants to fill the tubes with supports. Any solution for this?