I've just bought a stand/sit desk 70cm x 120cm which because of lack of space has to fit almost up against a wall. I need to buy a monitor arm for my 17" monitor and there's room enough for any clamp but not for overhanging arms. So I will need a model that allows the screen to be close to the back wall without any overhang. Either that or a strong monitor arm that I can clamp at the side of the desk and that will have a long reach into the middle of the desk. Any thoughts or recommendations please? BTW I don't want to drill a hole in the desk or use a wall-mounted arm.