This was advertised as coming with 4 sandbags and we only received 3.  There was also screws missing from the foot piece  which is what holds it to the leg allowing you to extend the leg.  We were not able to get the legs extended without those screws holding the foot in place.  When you pay almost 400 for a product it should actually be functionable.  The legs, once extended are also rusty, is this normal???