How do I tween a model?

I have a very large model that I need to tween all at once. I've used model:SetPrimaryPartCFrame inside of a for loop, but it's wayyy too jittery. Is there a way to utilize the tween service to make the movement of it smoother? I've tried some methods such as

local tweenService = game:GetService("TweenService")
local info = TweenInfo.new()

local function tweenModel(model, CF)
	local CFrameValue = Instance.new("CFrameValue")
	CFrameValue.Value = model:GetPrimaryPartCFrame()

	CFrameValue:GetPropertyChangedSignal("Value"):Connect(function()
		model:SetPrimaryPartCFrame(CFrameValue.Value)
	end)
	
	local tween = tweenService:Create(CFrameValue, info, {Value = CF})
	tween:Play()
	
	tween.Completed:Connect(function()
		CFrameValue:Destroy()
	end)
end

but it always returns and error with the CFrame value when I do tweenService:Create().

What is the most efficient way to accomplish this?

The most efficient way that I personally use is that:

1. I unanchor all parts

2. I anchor only one part (which I am going to tween and use as my "PrimaryPart" for that model)

3. I use Motor6Ds to weld all the parts together to the "PrimaryPart".

4. I then proceed to tween my anchored "PrimaryPart", and the model will follow it.

Note: To make the process easier and faster I use this weld Plugin to make my Motor6D's, it is very helpful.

This is the smoothest way to tween models to my knowledge after experimenting. I hope this helps, please let me know if you have further questions!