This is my weekend project. Tractor in question is a B7510. Can anyone suggest a length dimension from the end point of the 3-point arm, to where the top link mounts ? Should it be in line vertically, or ahead, or behind ? Using a 35 gal. plastic drum. Going to put 25 gal of concrete in,aiming for around 500#,plus the draw bar, plus the 2" receiver, and various other holder type thingamabobs. Any suggestions welcome. Thanks.