Need help with an AlignOrientation issue for a plane

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1

I am currently trying to make a plane vehicle that uses only the WASD or the Touch Joystick to move.

My issue comes from using an AlignOrientation to tilt the plane; I want the plane to be able to only have a max Pitch/Roll, and to also re-align itself to be level with the Baseplate if the player is not making any movement inputs.

Here is the code for the plane:

Code 
local Plane = script.Parent

local Seat = Plane.VehicleSeat
local Orientation = Seat.AlignOrientation
local Position = Seat.AlignPosition

local Speed = 30
local MaxPitch = 30
local MaxRoll = 70

Seat.Changed:Connect(function()
	if Seat.Occupant ~= nil then
		Seat.Anchored = false
	else
		Seat.Anchored = true
	end
end)

while task.wait() do
	if Seat.Occupant ~= nil then
		local Throttle = Seat.Throttle
		local Steer = -Seat.Steer
		local Pitch = math.rad(Throttle * MaxPitch)
		local Roll = math.rad(Steer * MaxRoll)
		
		local sx, sy, sz, m00, m01, m02, m10, m11, m12, m20, m21, m22 = Orientation.CFrame:GetComponents()
		
		local AppliedPitch = 0
		local AppliedYaw = 0
		local AppliedRoll = 0
		
		if Steer == 1 then
			if Throttle == 1 or Throttle == -1 then
				AppliedRoll = Roll
				AppliedYaw = Pitch
			else
				AppliedRoll = Roll
			end
		elseif Steer == -1 then
			if Throttle == 1 or Throttle == -1 then
				AppliedRoll = Roll
				AppliedYaw = -Pitch
			else
				AppliedRoll = Roll
			end
		end
		
		if Throttle ~= 0 and Steer == 0 then
			AppliedPitch = Pitch
		end
		
		--[[
			Line 59 (And I suspect Lines 28-30) are whats causing the issues
			As-is, the VehicleSeat re-orients to face north after releasing the keys
			If the line is changed to the following:
				Orientation.CFrame = Seat.CFrame * CFrame.Angles(AppliedPitch, AppliedYaw, AppliedRoll)
			then the AlignOrientation no longer "resets" itself to be level with the ground, and no longer respects the "Max" vars
		--]]
		Orientation.CFrame = CFrame.Angles(AppliedPitch, AppliedYaw, AppliedRoll)
		--Position.Position = (Seat.CFrame + Seat.CFrame.LookVector * Speed).Position --Uncomment this line to move forwards
	end
end

As the code is now, here is how the plane acts; Please note how after releasing the keys, specifically when banking/turning, the plane re-orients to face north instead of continuously turning

https://gyazo.com/6c71bc7f05cec48a55a5edbe3969265b

With a minor change to line 59 that adds the seat’s CFrame to the calculation, the “max” variables are no longer taken into account and the plane no longer re-aligns itself, but it does keep the new orientation - though it makes the vehicle near uncontrollable.

https://gyazo.com/f4b863e75adb9a78ac0351d47b938d1c

Is there any way to blend these two behaviors somehow, so that the plane will always re-align itself to be upright, but also keep any new transforms in regards to spinning on the Y Axis?

Here is a copy of the place download so it is easier to view the plane setup and suggest any changes I may need to make.
PlaneTest.rbxl (48.0 KB)

Thank you!