So... I have a game where well

u fly on a train to the glitchlands

u've probably heard of this before

anyways, current activation script here

local p = script.Parent -- InitialBase
local ding = workspace.getonguys -- sound
local choochoo = workspace.choochoo -- sound
local model = script.Parent.Parent -- workspace.Train, the model containing the InitialBase
local vroom = workspace.train -- sound
local db = true -- debounce
local _S = require(workspace.VariableThingies.Services) -- grab some variabulz
local thing = p.Touched:Connect(function(otherPart) -- connect to ze touched function
    if db then -- deboing
    db = false
    ding:Play() -- ding!
    ding.Ended:Wait() --  tick tock
    wait() -- arf
    for i, p in pairs(game:GetService("Players"):GetPlayers()) do
        local char = p.Character
        local humroot = char.HumanoidRootPart
        if humroot.Position.Y < 8.83 then -- if they're not on the train then 
            humroot.CFrame = CFrame.new(math.random(-2.75, 5), 8.86, math.random(-20, 9)) -- teleport them to a random spot on the train
        end
        local bodyForce = Instance.new("BodyForce") -- this is to help prevent the player from bugging out, you'll see what from later
        bodyForce.Force = Vector3.new(0, -50, 0)
        bodyForce.Parent = humroot
        char.Humanoid.Jumping:Connect(function() -- this keeps the player's Y velocity constant when they jump
            local Vel = humroot.Velocity
            bodyForce.Force = Vector3.new()
            _S.RunService.Heartbeat:Wait()
            repeat
                humroot.Velocity = Vector3.new(humroot.Velocity.X, humroot.Velocity.Y, Vel.Z)
                _S.RunService.Heartbeat:Wait()
            until char.Humanoid:GetState() == Enum.HumanoidStateType.Landed
            bodyForce.Force = Vector3.new(0, -50, 0)
        end)
    end
    model.Barriers.Door.CanCollide = true
    model.Barriers.Door.DoorScript.Disabled = false
    for i, p in pairs(model:GetDescendants()) do
        if p:IsA("BasePart") then
            local Vel = Instance.new("BodyVelocity")
            Vel.Velocity = Vector3.new(0, 0, 0) -- keep the train up
            Vel.Name = "Velocity"
            Vel.MaxForce = Vector3.new(4000, math.huge, math.huge) -- big fat load needs a big fat force
            Vel.Parent = p
            _S.CollectionService:AddTag(Vel, "VelocityObject")
        end
    end
    script.Parent.HoldmeWeld:Destroy() -- destroy the weld to the ramp
    model.Ramp:Destroy() -- ayyyyyyyyy destroy da ramp
    workspace.SpawnLocation.Enabled = false
    model.TrainSpawn.Enabled = true
    wait(3)
    choochoo:Play() -- CHOO CHOO
    choochoo.Ended:Wait() -- tick tock
    wait(1)
    vroom:Play() -- i like trains
    wait(1.65)
    for i,v in pairs(_S.CollectionService:GetTagged("VelocityObject")) do
        v.Velocity = Vector3.new(0, 0, -500) -- told you you'd figure out why
    end
    model.Decor.InfoStand.TextPart.update.Disabled = false
    for i,plr in pairs(_S.Players:GetPlayers()) do
        local humroot = plr.Character.HumanoidRootPart
        humroot.Velocity = Vector3.new(humroot.Velocity.X, humroot.Velocity.Y, -500 + humroot.Velocity.Z) -- ayy u ain't flyin' off now brubber
    end
    end
end)

But the system is unstable, because the velocity causes players to fall off very easily, despite the invisible barriers.

To fix this, I want to replace

for i,v in pairs(_S.CollectionService:GetTagged("VelocityObject")) do
    v.Velocity = Vector3.new(0, 0, -500)
end

with something like

local MoveTrain = coroutine.create(function()
    while true do
        for i, p in pairs(model:GetDescendants()) do if p:IsA("BasePart") then
            p.CFrame = CFrame.new(p.CFrame.X, p.CFrame.Y, p.CFrame.Z - 50)
        end end
    wait(0.1)
    end
end)
coroutine.resume(MoveTrain)

and

for i,plr in pairs(_S.Players:GetPlayers()) do
    local humroot = plr.Character.HumanoidRootPart
    humroot.Velocity = Vector3.new(humroot.Velocity.X, humroot.Velocity.Y, -500 + humroot.Velocity.Z)
end

with

for i,plr in pairs(_S.Players:GetPlayers()) do
    local humroot = plr.Character.HumanoidRootPart
    local co = coroutine.create(function()
        while true do
            humroot.CFrame = CFrame.new(humroot.CFrame.X, humroot.CFrame.Y, humroot.CFrame.Z - 50)
            wait(0.1)
        end
    end)
    coroutine.resume(co)
end

But issue:

Setting CFrame resets the orientation of a part to 0, 0, 0

And it's not like Roblox is gonna be nice with mah attempts, using humroot.Orientation will just throw the player into the astral dimension (#doctorstrangereference #whyamiusinghashtags #hashtag).

So how am I to retain the orientation of the parts (particularly the HumanoidRootPart and the rest of the character)?

EDIT: ok then for some reason doing the cframe stuff (without the angul stuff) also destroys the train, wat

EDIT EDIT: nvm i fixed it just needed to use :SetPrimaryPartCFrame()

now i just need to deal with the humroot cframe

oh wait

just do the same thing l.m.a.o

beep boop testing

oh wait

it makes no difference

thnx roblox