Placement System using Raycast Problem

[LioshaPlay (Zgoly)]

Hi, I have a problem with my script, it behaves strangely. I need that when the player takes the tool, the “shadow” of the block of his choice is displayed, and convert to the cursor position using Rays for a more correct position. But something is clearly going wrong, and the position of a “shadow” is multiplied by two. That is, let’s say that I have moved my cursor at position x10 y15 z20, and “shadow” is moved at x20 y30 z40.

Here’s a GIF:

Here’s a script:

local Player = game.Players.LocalPlayer
local Char = Player.Character
local Mouse = Player:GetMouse()
equipped = false


function FindPos(ignoreList)
	if Mouse.Target ~= nil and Shadow ~= nil then
		local unitRay = workspace.CurrentCamera:ScreenPointToRay(Mouse.x, Mouse.y)
		local raycastParams = RaycastParams.new()
		raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
		raycastParams.FilterDescendantsInstances = {Char, Shadow.PrimaryPart}
		local ray = workspace:Raycast(unitRay.Origin, unitRay.Direction * 250, raycastParams)
		if ray then
			return ray.Position, ray.Instance, ray.Normal
		end
	end
end

script.Parent.Parent.Equipped:Connect(function()
	equipped = true
	Shadow = game.ReplicatedStorage.Blocks.Wood:Clone()
	Shadow.Parent = workspace
	Shadow.Root.BrickColor = BrickColor.Blue()
	Shadow.Root.Transparency = 0.5
	Shadow.Root.CanCollide = false
	Shadow.Root.CastShadow = false
	Shadow.Root.Anchored = true
	Shadow.PrimaryPart = Shadow.Root
	Shadow.Name = "Shadow"
	
	local x = math.floor(Mouse.Hit.X + .5)
	local y = math.floor(Mouse.Hit.Y + .5)
	local z = math.floor(Mouse.Hit.Z + .5)
	local Normal = FindPos()
	local NewPos = Vector3.new(x, y, z)
	local FinPos = NewPos + Normal
	Shadow.Root.CFrame = CFrame.new(FinPos)
	
	Mouse.TargetFilter = Shadow.Root
	while true do
		wait()
		if equipped == true and Shadow.Root then
			local x = math.floor(Mouse.Hit.X + .5)
			local y = math.floor(Mouse.Hit.Y + .5)
			local z = math.floor(Mouse.Hit.Z + .5)
			local Normal = FindPos()
			local NewPos = Vector3.new(x, y, z)
			if NewPos and Normal then
				local FinPos = NewPos + Normal
				Shadow.Root.CFrame = CFrame.new(FinPos)
				--game:GetService("TweenService"):Create(Shadow.Root, TweenInfo.new(0.1), {CFrame = FinPos}):Play()
			end
			else
			Shadow:Destroy()
		end
	end
end)
script.Parent.Parent.Unequipped:Connect(function()
	equipped = false
end)

Thanks for any help!