Generations Brainstorm Head Removal

So I'm sure that most people here have seen the Baltmatrix Brainstorm review (and if not, here: https://www.youtube.com/watch?v=NXvOIS4symw) where he had an issue with Arcana's head getting trapped inside Brainstorm's collar. In this case the head was trapped due to clip in the collar going over the top of a socket instead of into the socket itself.
I found myself also running into an issue with getting Arcana's head out, and based on some advice I saw online I tried "rolling" the head forward while removing it. I got it quite a way with bent paperclips and pressure, but even once the clip was no longer an issue it was still stuck.

It looks like the nubs on the side of the head caused it to get stuck (though the angle probably didn't help). There are two tracks for the nubs in the base of the collar but the tracks end just below the surface, to hold the head in place. It looks like on mine, maybe the nubs are just sliiiightly too wide. Either way once I'd removed the head once and knew what I was looking for I was able to remove and reattach the whole headmaster a few times until the friction of the nubs and tracks was less than the friction holding the balljoint in.
Just wanted to share my experience in case anyone else was seeing this issue.
I found myself also running into an issue with getting Arcana's head out, and based on some advice I saw online I tried "rolling" the head forward while removing it. I got it quite a way with bent paperclips and pressure, but even once the clip was no longer an issue it was still stuck.

It looks like the nubs on the side of the head caused it to get stuck (though the angle probably didn't help). There are two tracks for the nubs in the base of the collar but the tracks end just below the surface, to hold the head in place. It looks like on mine, maybe the nubs are just sliiiightly too wide. Either way once I'd removed the head once and knew what I was looking for I was able to remove and reattach the whole headmaster a few times until the friction of the nubs and tracks was less than the friction holding the balljoint in.
Just wanted to share my experience in case anyone else was seeing this issue.