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Are you trying to adjust the tilt on the room at the top or bottom? That is the effect of raising or lowering this on the arms. You usually do this when the room is either too far out on top to close or the bottom hasn't closed when the top is. Let me know what you need to do here and I can offer more. All follow ups are included in our fee.
Just checking back in to see if you perhaps missed my earlier response to your question? If you get back to me I can help you resolve this if you get me the information I asked for here.