Hello, I used a c20xe with 2.8 motronics to install a lighter plate-swing wheel of the older models. the engine is actually running quite well, but it vibrates more strongly than you are used to from xe. these vibrations make it a bit weak in the 5th on the track towards the end speed, I imagine. in the lower passages this is less noticeable. to check my suspicion of the unbalance in the system, I removed the pressure plate through the maintenance flap at the gearbox and pressed it by 180° the vibrating has become noticeably less, but still stronger than with other xe’s. now a question about the technology. can you actually exchange the washers cheerfully? because they can only be mounted in one position, the presumption is that they would be balanced in the production of the engine together with the crankshaft. that would mean the original combination of motor with washers would be “tailor-made”. a fine balance of the vibration Cheibe would minimize the effect, but the unbalance of the crankshaft would still be there.