Just a few points...
If the spring itself is treated as a piping component - one with very low (axial) stiffness - the preload on that spring can be thought of as a cold pull (cut short). That's what you are doing when you adjust the spring to carry a pre-defined load. This "pull" is much better defined than cutting out a length of pipe since the manufacturer determines the true performance of the spring and the sets the provided preload at the shop. Conceptually, you are "pulling" the other end of the spring so that a predetermined load (along with the requisite stiffness) is applied to the system.
What complicates things is we seek to set a load for the operating position while we check our spring settings in its installed position. Since the spring moves from installed to operation, the installed load is out of balance (either too high or too low). (A low load variation will limit this out of balance condition.) Matters are further complicated if the system load in the installed position (empty, e.g., WNC) does not match the system load in the operating position.
Any additional spring adjustment in an attempt to transfer load away from sensitive equipment may bring additional imbalance to the installed state.
Do what you have to do to get the designed operating loads correct and check your work. Then make sure these springs show the proper operating load in the field.