[luti]

Be carefull with aluminium. It is very easy to strip the threads or in some cases completly pull the threads right out if you over torque something. Get a good torque wrench (ie: a click stop) and do everything to spec. If the bolts you are using are the same material as the flywheel then expasnion/contraction will not be an issue. I've never heard of this happening, but I guess it is possible. Call the manufacturer of the flywheel and see what they say about that and the steel washer/disc you want to build for it. Good luck.