Yeah squatting when I used it wasn’t too bad… Like you said, you just place your feet slightly ahead of you to ensure your back is inline with the movement of the fixed position. For those I definitely had a good workout on my legs that day.
Is it possible to effectively deadlift on a smith machine?
As for benching, should I focus on flat or incline?
I’m looking to do the 5x5 stronglifts again and stop complicating my perspective on it. As long as I position myself correctly, I should be fine and so should my joints.