So this platform has adjustable feet, but was supplied with nylon nuts to set height, not practical., used regular 8 mm nuts. Had issue to open properly, one pin did not want to enter hole, had to loosen nut near it to allow pin to find hole, tightened afterwards. Finally ready to use, I go to sit in middle, heard noise and platform was loose. Found weld on support bar failed, unit is unsafe not usable. Have to wonder about remaining welds on this platform.