and then you said:I'm thinking it would make locks at least 10 times harder to bump.
While alternating the sprins is a partial solution to the issue, it by no means nutralizes bumping.
So what do we want? A solution that is acceptable risk? or 100% no way to bump? A Medco biaxial isn't 100% solution to picking, but it's an acceptable risk. And alternating pin weight and spring stiffness will cost a whole lot less than a Medco and might provide acceptable risk to bumping. Just my rantings. Thanks for listening. - Joe