Hard to tell from the pictures where your feet were, but...it's easier to really crank on a bolt when you are standing on the engine stand legs. If your feet are on the floor, the whole stand rolls around instead.
yeah I had half my body and foot jammed against the stand because the whole engine felt like it was going to fall over with the torque being exerted..
Have to say your documentation is excellent. Pictures are crisp and clear. Could you tell us the make, model of camera and what lenses you used. Thanks. John