Hi All I'm new to the site. And please no negative comments. Its just a waste of being helped! What I want too construct is a Square tubular aluminum bar 18'' long 1'' square dia with a 9'' long tubular aluminum bar place on top and hinged on each side of the 18'' bar what the two smaller bars would do is lift the two lids at the same time and at any angle from O-dgrees to 100-dgs.Like Push and pull How can i make one of the 9'' bars lift as the other 9'' bar is being lifted by a motor. and without any pullies or cables on the oposite 9'' bar. I seen this mechanism somewhere but can't remember where. Dose any one know of or see a mechanism that make one bar lifts as the other bar pulls. This mechanism would be extrude in the square tubular bar.