How would I make this object placement system be able to support models and make objects deleteable?

I watched a video online about how to make a grid placement system, but Im just wondering how to make it be able to support models and have deletable objects as he did not include those in the video. I know scripting, I just dont have enough knowledge in order to make this.

I have uploaded the file here if anyone wants to help me. :slight_smile:
placementsystem.rbxl (70.3 KB)