How to tween models?

So, I’m fairly new at coding, and I wanna know ( if it is even possible ) = how do you use the tweenservice to tween all the parts in a model?

Currently, I’m using SetPrimaryPartCframe in a loop to create a type of elevator, however, when I do this, it lags for some people causing them to go through the part or get stuck inside of it.
Hence why I want to use a tween, to make it go down more gentle and in a uniform motion.

I’ve thought of using body force, but I just can’t figure out how they work properly >.<

Thanks for reading!

See any or all of the below:
https://devforum.roblox.com/t/tweening-models/60545
https://devforum.roblox.com/t/any-way-to-tween-a-model-via-tweenservice/56845
https://devforum.roblox.com/t/can-you-use-tweenservice-create-on-model-setprimarypartcframe/130345
https://devforum.roblox.com/t/how-do-i-use-tweenservice-with-setprimarypartcframe/63466
https://devforum.roblox.com/t/changing-the-cframe-of-a-model-smoothly/62320
https://devforum.roblox.com/t/best-way-to-smoothly-move-a-model/87407

Make sure to perform a search to see if your question has already been answered before.

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