why does my moving platform not stay in its trajectory ?

Hello,

I created a moving platform using "BodyPosition and BodyGyro" it works perfectly as I wanted it to, however once the orientation of the model i changes it still works but a slight shift this product without any explanation.

Here is the model without orientation: https://gyazo.com/c341faf0bb52bb996ded9bb91d2dffa0

The trajectory of the platform is straight.

Here is the model once oriented differently: https://gyazo.com/305b1a7d8d51d4a9b4c0c9d3bb13bf42

The trajectory of the platform does not remain straight she's slightly drifted.

Here is the script used, which is placed in the model:

local model = script.Parent
local platform = model.Platform
local start = model.Start
local finish = model.Finish
local bodyPosition = platform.BodyPosition

platform.BodyGyro.CFrame = platform.CFrame

while true do
	bodyPosition.position = start.Position
	wait(2)
	bodyPosition.position = finish.Position
	wait(2)
end

and oddly if I place the orientation of the model on: 0, 45, 0 it works the trajectory remains quite straight, but not if I put: 0, 60, 0 for example. Anyone have any idea what's going on?

Thank you !

You'd wanna do something like this:

local tweenService = game:GetService('TweenService')

local Model = script.Parent
local Platform = Model.Platform -- it is ideal that this part is anchored, it will move regardless

local Start = Model.Start
local Finish = Model.Finish

local tweenInfo = TweenInfo.new(
	1, -- how long should it take to reach it's destination?
	Enum.EasingStyle.Linear,
	Enum.EasingDirection.Out,
	0, -- how many times should it repeat?
	false, -- should it repeat?
	0, -- delay
)

local startProperties = {
	CFrame = Start.CFrame -- moving it to the start cframe
}
local finishProperties = {
	CFrame = Finish.CFrame -- moving it to the finish cframe
}

local finishTween = tweenService:Create(Platform, tweenInfo, finishProperties)
local startTween = tweenService:Create(Platform, tweenInfo, startProperties) 

while true do
	finishTween:Play()
	wait(2)
	startTween:Play()
	wait(2)
end -- while true do end