Delete solid within solid.

 From:  Moi3dFan
11555.2 In reply to 11555.1 
There's a video at the link here of how I did it.
The video came out very big(

https://drive.google.com/file/d/1w7SuaRi_1ISVDRiIe7DtArCGgRwo26Sb/view?usp=sharing