So I'm a bit confused here. The book includes various RLLs (headstand, headstand weighted, stall bars, and handstand) which SEEM to be similar to handstand presses. However, the HS Press WODs use box presses instead of RLL variations.
Are these two things different exercises? Or is a headstand leg lift really just an easier form of an HS press?
Additionally, should headstand presses be done against a wall to ensure no lean? Or is lean allowed in RLLs?