Thats what i thought too, and heard timing was tight to get it out, wasnt ever able to do it tho.I'm pretty sure you just press 236A1/A2 for lvl1 and 214A1/A2 for the level 3. I don't think you have to do the full half-circle.
I believe half circle is the correct input, no strict timing needed or hard knockdown. All that is needed is a single landed hit and then u can convert to a tag super.