How to make the orientation change of a tween universal?

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#1

I am working on a vault door that will tween 90 degrees to the right when it opens. As you can see below, it works pretty nicely:

However, once I start rotating the model around, it does not open as nicely or the right way I want it too, as seen here:

How do I fix this? Below is the code:

local old = script.Parent.PrimaryPart.Orientation
local new = old + Vector3.new(0,90,0)

local module = require(workspace.TMmoduleV2)
local info = TweenInfo.new(3,Enum.EasingStyle.Linear,Enum.EasingDirection.Out)

task.wait(2)
task.spawn(function() module.TweenModuleOrientation(script.Parent,info,new) end)

---here is the tween function in entirety:
local module = {}
module.__index = module

local TS = game:GetService("TweenService")
local Debris = game:GetService("Debris")

local function CalculatePosition(part1,part2)
	return CFrame.new(part1.Position):ToObjectSpace(CFrame.new(part2.Position)).Position
end

function module.TweenModuleOrientation(Model,Tweeninfo,oOrinetation)
	if typeof(Model) ~= "Instance" then error(Model.." isnt a instance") end
	if not Model:IsA("Model") then error(Model.Name.." isnt a model") end
	if not Model.PrimaryPart then Model.PrimaryPart = Model:FindFirstChildWhichIsA("BasePart") end

	task.spawn(function()
		local Primary = Model.PrimaryPart
		local AnchorState = Primary.Anchored

		local TW = TS:Create(Primary,Tweeninfo,{CFrame = Primary.CFrame * CFrame.Angles(math.rad(oOrinetation.X),math.rad(oOrinetation.Y),math.rad(oOrinetation.Z))})

		for _,v in pairs(Model:GetDescendants()) do
			if v:IsA("BasePart") and v ~= Primary then
				local weld
				if not v:FindFirstChild("TweenWeld") then
					weld = Instance.new("WeldConstraint")
					weld.Part0 = Primary
					weld.Part1 = v
					weld.Parent = v
					weld.Name = "TweenWeld"
				else
					weld = v:FindFirstChild("TweenWeld")
					weld.Enabled = true
				end

				local anchord = v.Anchored
				v.Anchored = false
				task.spawn(function()
					TW.Completed:Wait()

					weld.Enabled = false
					v.Anchored = anchord
				end)
				
				continue
			end
			if v:IsA("Weld") or v:IsA("WeldConstraint") or v:IsA("ManualWeld") or v:IsA("Motor6D") then
				if v.Name ~= "TweenWeld" then
					v.Enabled = false
					task.spawn(function()
						TW.Completed:Wait()

						v.Enabled = true
					end)
				end
				
				continue
			end
			
			task.wait()
		end

		TW:Play()
		TW.Completed:Wait()

		Primary.Anchored = AnchorState
	end)
	return
end