OK, so the loose version of the combo tool I have is the one featured in these two pictures:
I did a cheap strength test buy putting the tang in a vise and then grabbing the end with pliers. Although I can get it to deflect quite a bit (upwards of 20 degrees), after release it always returned back to it's original shape. That is to say, it's rather flexible like a spring. I took it out of the vise and laid it down flat on a table to verify that there's no deformity. It's certainly not something I could permanently bend with just my fingers.
I know this version of the combo tool has a different shape from the 91mm ones, is it also made out of a different type of metal or heat treated differently? In other words, are my findings with this tool invalid vis a vis the version I actually want to use?