im glad you did find this out, because like you said not everyone uses the b-stick. Not everyone reads the op from top to bottom, so it was good that you brought this up. Maybe someone will be able to turn this into something bigger.
In regards to adding it, i still will because it was under 'b-sticking'. ill put it under arrows and will mention both ways. ill also add the yellow.
Cheers mate!
I think I found something else, (I'm on a roll here)
The Special Momentum Shift
It's a technique that makes you reverse your momentum without turning and facing the other way.
Well this is only partly true, in actual fact you are turning around twice really quickly so it looks like you haven't turned around at all.
It's quite easily done with a boomerang and it's possible to do with an arrow, I'm just not entirely sure how. Edit: I now know how to do it with an arrow as well, I will explain later on. Using a boomerang is still easier.
It can be done by jumping backwards and forwards, but backwards is more effective.
For explaination purposes I'll use the boomerang as the projectile, I'll also say backwards and forwards instead of left and right (Just know that if your facing right and I want you to hit right, then I'll say forwards and visa versa). Enough talk. This is how you do it.
To do the Special Momentum Shift jumping backwards, jump backwards and smash Backward B, Forward, really quickly. This will make you jump backwards, start throwing the boomerang behind you, turn around and throw the boomerang the original way you were facing (forwards), and reverse your momentum so instead of jumping backwards, your now jumping forwards. (You still with me?)
To do the Special Momentum Shift jumping forwards, jump forwards and smash Backward B, Forward, really quickly. This will make you jump forwards, start throwing the boomerang behind you, turn around and throw the boomerang the original way you were facing (forwards), and reverse your momentum so instead of jumping forwards, your now jumping backwards. Note this way is less effective.
The Special Momentum Shift can as I said be done with an arrow as well. I think the way to do it with an arrow is instead of smashing Backward (In Backward B, Forward) you tilt hit backward, then continue the B, forward as usual.
Edit: This is confirmed, this is how you reverse your momentum without turning around using an arrow. I'll explain in more detail.
To do this with a boomerang you jump in any direction then hit Backwards B, Forwards really quickly.
To do this with an arrow you jump in any direction then slightly tilt Backwards B, then hit forwards as usual (All done really quickly of course).
Is this already known how to do with the B-stick? I've never heard of anyone using the B-stick to reverse their momentum but not turn around. Anyway let me know what you think.