I repeat AGAIN Cube, one last time: the helmet thing in Onslaught is completely irrelevant, seeing as how Psylocke's powers got through it TWICE, once in Uncanny #322 of course, and again in X-Men #53. Now Cube, you say Psylocke got through the helmet the first time because "his helmet was damaged", but how do you explain the second time, when his armor is completely intact? I'll answer, there is no explanation, that's how screwy some of the things in Onslaught were, it was completely forgotten or ignored, a clear case of PIS. And you really don't think Onslaught got into Juggernaut's head in their first meeting? Well, the fact that Juggernaut's mind was all f*cked up after should make that point pretty obvious, but anyways, Jean did find the psychic block that was in Juggernaut's head in X-Men #54, and finds out who Onslaught is. Don't believe it? Well, I suggest looking it up yourself, or reading it. How'd he know who Onslaught really was? Who knows, but he knew it, and that's what mattered.
And yeah, Alpha's right, this SO has absolutely nothing to do with Hulk vs Juggernaut, as I mentioned yesterday. But I just needed to clear that little detail up so we could move on.