A device for establishing an adjustable connection between a drawer, having a panel and a bottom, and a furniture guide rail. A number of parallel transconductance gain stages are connected to the switching network. In a preferred embodiment, the structural member is comprised of thermally conductive material while the connective member is comprised of conventional PWB material. The partition wall has a cross-sectional taper angle of 20 to 50\xb0, and edges of a top and bottom thereof are rounded. When hydraulic shaft draw back, pivotal arm pulls back ladder rack to horizontal position on vehicle’s roof.