[what's up]

I'll take the word of folks who were with Mary while she was alive, and who passed her story along to those Church fathers

Nonsense...they did not pass along any story of Mary's sinlessness.

As for the title of Co-Redemptrix; it is simply a statement of the fact that Mary was an active participant

No, "co" implies equality whenever it is used (as in co-ruler or co-op or co-sign). "Co" never implies simply an aide.

Yes, she was a participant in God's plan as was Abraham. But he is not considered a co-redemptrix. That was a very unfortunate term for the RCC to assign a created woman.

[khnyny]

You might want to check out the work and writings of Marcus Grodi.

[SuziQ]

AS I said before, far be it from me to assign any limits to God's generosity, or to assume that He cannot do what He means to do.