For me, at least. For a number times, I have gotten the P-Switch between the pipe and the ? Block. The only problem is that this is the precise moment that I hit the ? Block! Are there any specific frames that I need to get that P-Switch to get a wing factory? This is very frustrating and I can't get it even once.

Can anyone in extreme detail explain what a successful tubular wings looks like? I have watched a couple of videos on this (even one that showed the controller on the side so that you know what the player is pressing in real time.) I have heard of audio cues, but what specific one to follow.

Do I press B while holding down? Do I press B while holding up? I don't know but please help!

EDIT: Is my game glitched? I tried producing a wing factory without Yoshi by having Yoshi spit the P-Switch into the left side of the pipe and then scroll buffer the P-Switch to the right. It was very close to the P-Switch but did NOT produce the wing factory. Does Yoshi have to be present for the wings to appear?

EDIT 2: What versions of Super Mario World does Tubular Wings work on? It doesn't work on mine.