Most aftermarket suspension is aimed at improved handling so are harder than the Mini's sports suspension even in their softest settings. This is especially true for coilover kits. Changing to non-runflat tyres are the only sure way to soften the ride, Koni FSD's help as well. To see what I mean look at KONI FSD Dampers Improve Handling Without the Traditional Sacrifice in Ride Quality for an example. I have non-runflats and FSD's to declare a bias .