Completely agree on the fact you have to be conscious to mangle the gasket. I have the new and old cap, both fit snug enough without having to push down on it. also if you lube it with oil it slides and keeps the gasket in place. If these techs (some) would just pay attention to the actual mechanics involved in something simple as an oil cap .... guys at my local Indy shop are meticulous in comparison.
08 E90M3 6MT Alpinweiss/Carbon/BPMSport 91 octane tune/BPMSport Feature coding/BMW Pedals/Dinan Exhaust/Alcantara Wheel/Rear Fog Switch/Rattle fixes