So after trying to transform my Soar for the first time, I noted the knee joint of one of the legs did not bend as intended, so I had to make some interventions! The easiest way seems to be to loose (or remove) the first screw and force the shin into the right place (the knee joint will click), then put the screw again. You might also need to disassembly the leg, as I did (if so, take care with the two different screws).