[_dV]

The extra spacer doesn't fill a gap between the spring and the end of the shocks as the tube will have filled virtually all of that. It should actually precompress the spring a little adjusting both ride height and stiffness. There is a fairly big diff between the stock pink springs and the white springs so if you want a stiffness in between the spacers are the only way to get it.

The stock short spring actually seems to be slightly less stiff than the pink spring. You can see this if you hold them end to end and try to compress. So there is some small amount of dual rate happening. What i'm not keen on is the plastic collar that joins them. It rubs a lot on the shock body when things get dirty. What would be nice is a single dual rate spring not two separate springs. I used to run Raven dual rate springs when i had the LST shocks on and they were worked quite well.