How to make a 3D placing system with a free-camera?

Late Yesterday I decided to make a ‘Physics Sandbox’ type game. I had already made a free-camera, but I am stuck on how to make a Placing system.

(sorry if the video is slow, it was from Gyazo)

The video above was me putting the parts at the CFrame of mouse.hit, but I think I need a placing system more like the ones in Roblox Studio and Blender.

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With the mouse.hit, fireserver with the position and insert a part to the position

Mouse.hit still doesn’t solve, that is what I didn’t want to use.