Changing Orientation of a weld?

Is there a way to change the orientation of a welded part without breaking the weld. My script is below and it is for a custom animated sword. It welds the HRT (HumanoidRootPart) of the sword to the handle of the tool, however, the HRT is always the same orientation as the handle. I want the HRT to be leaning back a bit so the sword looks more realistic so I added the HRT.Orientation part. When it runs it breaks the weld and the sword just falls.

function onEquipped()
    handle.CanCollide = false
    HRT.CanCollide = false
    local Weld = Instance.new("Weld", HRT)
    Weld.Part0 = handle
    Weld.Part1 = HRT
    Weld.C0 = CFrame.new()
    Weld.C1 = CFrame.new(1, -3, 0)
    UnsheathSound:play()
    HRT.Orientation = Vector3.new(0, 90, 0)
end