How would I tween a model (PrimaryPart - tweening)?

How would I tween a model (PrimaryPart - tweening)?

Alright, I know the method :SetPrimaryPartCFrame(), and I know how to tween single parts.

What I do not know how to do, is how I would tween an entire model, similarly to doing :SetPrimaryPartCFrame to a model with a placement system. (What I mean is that I want to tween the entire model)

I have no idea what to do in order to tween the entire model relative to it's PrimaryPart

I have this coding for my single-part tweening:

ntarget is specified as the part I want to tween, earlier in the script.

local TimeForObjectToTweenBack = 0.2

function TweenPart()
	if ntarget ~= nil then	
		local goal = {}
		goal.Position = PrevPosition --PrevPosition is also specified earlier in the script, don't worry. :|
		
		local tweenInfo = TweenInfo.new(TimeForObjectToTweenBack)
		
		local tween = TweenService:Create(ntarget, tweenInfo, goal)
		
		tween:Play()
		wait(TimeForObjectToTweenBack)
		ntarget = nil
	end
end

Any help is greatly appreciated!