How to fix this script so the VehicleSeat can work?

So I found this Hovercraft and the whole script works but the DriverSeat (Vehicle Seat) Does not work and I tried to fix it but having a hard time... I tried to change the settings in the VehicleSeat but that does not work. It seems like it's missing a few things in the script to fully function better.

What's not happening is that it's not letting me drive but the hover function is working just not the driving part.

Hierarchy

Script

local Maxheight = 4

local Maxspeed = 10

local vehicle = script.Parent
local seat = vehicle.Functional.DriverSeat
local main = vehicle.Functional.Main
local t1 = vehicle.Functional.Thruster1
local t2 = vehicle.Functional.Thruster2
local t3 = vehicle.Functional.Thruster3
local t4 = vehicle.Functional.Thruster4


function Raycast()
    local ray1 = Ray.new(t1.CFrame.p, Vector3.new(0,-100,0))
    local hit1, hitpos1 = game.Workspace:FindPartOnRay(ray1, t1)
    local ray2 = Ray.new(t1.CFrame.p, Vector3.new(0,-100,0))
    local hit2, hitpos2 = game.Workspace:FindPartOnRay(ray2, t2)
    local ray3 = Ray.new(t1.CFrame.p, Vector3.new(0,-100,0))
    local hit3, hitpos3 = game.Workspace:FindPartOnRay(ray3, t3)
    local ray4 = Ray.new(t1.CFrame.p, Vector3.new(0,-100,0))
    local hit4, hitpos4 = game.Workspace:FindPartOnRay(ray4, t4)
    print("all rays created")

    t1.BodyPosition.position = hitpos1 + Vector3.new(0,Maxheight,0)
    t2.BodyPosition.position = hitpos2 + Vector3.new(0,Maxheight,0)
    t3.BodyPosition.position = hitpos3 + Vector3.new(0,Maxheight,0)
    t4.BodyPosition.position = hitpos4 + Vector3.new(0,Maxheight,0)
end

Raycast()