The engineer who came up with the idea of a spring constant was obviously an ivory tower academic out of synch and disengaged from reality.
Any real world person with a shred of common sense knows that there is no such thing as a spring "constant". A spring is NEVER where you want it, as you want it and when you want it.
In truth, the problems we have with springs can all be explained by the theory of special spring relativity. Just as light always travels at the same speed, all springs are the same size and tension. The perceived differences are an artifact of local disturbances in the space-time continuum. For example, when a spring looks too small it is because the local space-time matrix has undergone a temporary expansion. The expansion of the matrix has a natural tendency to reverse polarity, making the next spring appear too big. Only by trying enough times to satisfy the stochastic distribution is it possible to, by chance alone, arrive at an intersection of time and space such that the spring, which is the same size as every other spring, appears to the observer to fit the immediate frame of reference.