Instructions for iheartsynergee models including: Adustable Bench
the manual). This should give the leg/feet a bit of wiggle room. Move the feet as needed to make them all level on the ground. If your bench is still wobbly, check that the large bolt (M12*125) that connects the back cushion and the seat cushion to the main frame is tightened adequately. You will need a wrench and a socket to tighten this