On the dimma I'm using gaz gold coilovers, Im using 8" springs and they are as low as they can go.
When I drive slowly over a speed bump etc you can hear the spring rattle around as It doesn't take much travel until the spring isn't under tension.

I'm guessing a helper or tender spring will take up this slack when the damper extends!

Obviously I will need shorter main springs to account for the added spring length of the helper/tender spring when it's compressed!

What length helper/tender springs shall I go for and what spring rate as I notice helper are less than tender springs

So .....

Am I right in thinking helper springs are less lb/ft than tender, helper springs help keep the main spring under tension where as tender springs are a higher lb/ft and are used as a softer spring to take up little bumps before the main spring comes into play