Button. If you read through all the posts on the subject by people who have tried both the Suplex and the Morgan ARP4 systems all are in agreement that the 5 link suspensions systems give both improved comfort and handling.

The major problem with leaf springs is the stiction between the leaves. It can be improved by lubrication (motorcycle chain lube) but will never be as good a coil springs which,obviously, do not have this problem. The rest is geometry,engineering, and tuning of the components, springs and dampers. You can do much more with coils, including rising rate, than you can ever do with leaf springs.

Peter

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