Reply To: Supports needed in Slicer or not?

Looking awesome.

3D printers can bridge gaps of small enough size, so if your slots are small enough you can orient them face down without supports. Different printers will be able to bridge better or worse, but if you reduce the size of your holes your printer may be able to print it without supports. Another option is to tapper the slot so it isn’t flat, but rather it slopes upwards. Here is and image of an object you could use to create the slots with. 

(Something like this):