I really can't decide wether to think this is a bad or good design. The top bearing assembly is fixed to the shock piston by one nut and the energy from the spring. The nut is screwed onto the piston until it stops, then the spring is released at the correct position of the underside of the bearing assembly. It is now possible to adjust camber on the top bearing. I was told not to alter this by Fiat, as there are no adjustments on the hub, where the shock absorber is bolted with two bolts.
When this bearing is twisted, the top level will alter it's angle, and hence the complete unit will point in another direction when inserted. If the markings on both parts of the top bearing assembly is at "zero" it will fit straight into the suspension turret, laying flat up there. So when you turn the wheel when the car is on the ground, this means the direction of the shock piston vector will change, due to the design of the top bearing assembly having the ability to twist and bend in it's own design. This might actually be a good thing... just trying to think here... to keep most of the tyre's area on the street when cornering. Fixing the tops of the shock pistons to each other or force it to the turrets will propably destroy this idea.
A possible bad result of this design is if the steering wheel is turned when the wheels are off the ground. If you pop the hood and watch the suspension turrets and the big washer and nut that holds the strut to the turret, you will notice a gap there. On the OEM shocks there are used pretty high nuts, making a gap of about 5 mm from this washer (with rubbermold) to the suspension turret. After changing to the Eibach shock this gap has decreased due to a slightly lower nut. But if you jack up the car this gap will vanish into thin air, because the complete unit actually falls out of the turret the exact lenght of the gap mentioned. This now means there is no pressure on the top mount assembly, making it possible to twist complete inside the turret, and ending up at the complete wrong direction - if the steering wheel is turned when the car in jacked up.
This might be one of the reasons of strange tyre wear. I have not had any problems with it though. Well, that was my creative morning idea.
Morten.