I just got the LK1 and have the software. Is there a way to created custom supports where you want them instead of waisting so much material

I build using MatterControl which is free, and there are a few option for supports as well as turning support, rafts, brims etc. off altogether. It definitely helps me to design in MC and finalize by importing the gcode into the Longer slicer.

Cura4.x version, you can add "area without support".

https://www.longer3d.com/download-center