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Really? It SHOULD work... Post on the "Ask a Simple Question" thread with more info.
Also, to the OP: Should you ever have questions, you can post on the thread "Ask a simple question, get a simple answer." You can find it here. There's tons of people who check back every day (myself included) and everyone is super willing to help.
It might just be that in the mod author's measuring system for inertia, a lower value means "harder to spin up." Inertia, just for reference, is based off of mass; which materials are you using, exactly?