Tweening a Model using TweenService?

I'm wanting a train Model to move on it's track with TweenService. I've checked out https://devforum.roblox.com/t/any-way-to-tween-a-model-via-tweenservice/56845 and it did help a bit! I'm still struggling to get the "Main" Part to move to "NewPoint" 's position.

It seems like it's the 2nd to last line for the C1. Help greatly appreciated!

Updated as of 7:52 CST

local TweenService = game:GetService('TweenService')

local Nodes = workspace:WaitForChild('Nodes')
local Train = script.Parent

local Speed = 2
function GetTime(Distance, Speed)
	local Time = Distance / Speed
	return Time
end

local NewPoint = Nodes:WaitForChild('001') -- New selected point/node
local Distance = (Train.PrimaryPart.Position - NewPoint.Position).magnitude 
local Time = GetTime(Distance, Speed) -- Calculate the time

-- Welds 
local All = Train:GetChildren()
for A = 1,#All do
	if All[A]:IsA('BasePart') then
		if All[A].Name ~= "Main" then
			local NewWeld = Instance.new('Weld')
			NewWeld.Name = "Weld"
			NewWeld.Part0,NewWeld.Part1 = All[A],Train.Main
			NewWeld.C0 = All[A].CFrame:inverse()
			NewWeld.C1 = Train.Main.CFrame:inverse()
			NewWeld.Parent = Train.Main
		end
	end
end

local NewWeld = Instance.new("Motor6D")
NewWeld.Name = "Motor6D"
NewWeld.Part0,NewWeld.Part1 = Train.Main,NewPoint
NewWeld.C0 = Train.Main.CFrame:inverse()
NewWeld.C1 = NewPoint.CFrame:inverse()
NewWeld.Parent = NewPoint

---

local NewTweenInfoTable = TweenInfo.new(
	Time,
	Enum.EasingStyle.Linear,
	Enum.EasingDirection.Out, 
	0,
	false,
	0
)

game:GetService("TweenService"):Create(NewWeld,NewTweenInfoTable,{C1 = CFrame.new(NewPoint.Position)}):Play()
print(NewPoint.Position)