Hey there! I have an idea and I'd like some feedback. I'm putting together a manual M60 BMW here, so I need a flywheel. I'd really like not to use the original dual mass one, but a lighter one, which sadly does not fit in my budget right now. I'm thinking of using a flexplate from an auto box and getting a 240mm flywheel from an in-line 6, let's say M30. Then I'd take the M30 flywheel, shave it on the lathe only leaving the friction surface and the clutch mounting surface and then bolting it to the auto flexplate (I can make holes with threads in the back of the "friction disk" from the M30 engine and then run bolts through the flexplate). Then all goes to balancing. Using a flexplate from a 2000+ V8 4.4 car means it will weigh around 3.8kg according to bmwfans, so the whole setup should be around 7 kg. I can use an original V8 dual mass flywheel to take my measurements about the deck height of the whole setup, so it should have the factory specs. Will the thin flexplate from the auto box hold the added weight? After all it's steel and some aftermarket light-weight flywheels are from aluminium. I know that I should not be messing around with something spinning with 6500RPM close to my feet.