Hi Ray:
Did Koni mention if the Motorsports inserts they suggested was the 8610 single adjustable ? I have this in my fronts, with the shortened strut housing. The length of the strut insert body is 330mm, max stroke length of 550mm, minimum of 451mm. Total stroke length is 151mm. This has been a great strut insert for my autocrossing. I think the limited amount stroke is a detriment on the street. Their 8611 double adjustable strut insert had me excited for a bit, length looked close to stock dimensions but then realized the adjustment for the compression is at bottom of the insert. Not too possible for our cars.
I was quite pleased with the performance of the Rancho RS9000 in the rears at yesterdays autocross. Because of the bumpy course, I started at the setting 3, and by my third run was at softest setting (at setting 1). Left it there for drive home, not a bad ride.
Don L.