Welding an accessory to a fake head

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Hey! So basically I have this one function that connects the welds between a fake head’s hatweld
and an acessory’s hatweld too. What happens is whenever the Y axis orientation of the head is not 0, it offsets them a lil bit making them not be properly positioned, can anybody help me?

local function equip(hat, human)
                    local hatAttach = hat:FindFirstChildOfClass("Attachment")
                    local humanAttach = human:FindFirstChild(hatAttach.Name, true)
                    local human = humanAttach.Parent

                    hat.CFrame = hatAttach.CFrame:Inverse() * human.CFrame * humanAttach.CFrame

                    local weld = Instance.new("WeldConstraint")
                    weld.Part0 = hat
                    weld.Part1 = human
                    weld.Parent = hat
                end