Join Surfaces - On vs Off

Hi all! I was wondering if Join Surfaces was better when turned on, or if it is better off. I am not that experienced of a builder yet so I was wondering. Thanks!

JoinSurfaces basically just creates welds between 2 parts, it’s useful is you are planning on building something that is going to be unanchored and should connect to each other.

But if you are building something that is going to be anchored it is more optimal to leave JoinSurfaces off.

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