"and not the stock plastic rack that bolts to the aluminum rails of the C14"
OMCRIDER: The rails on the C-14 are made of plastic, not aluminum. So you have plastic rails, plastic rack, plastic mounting plate and a plastic trunk, You will get lots of wiggle when you compound the flexibility inherent in each component. My rack will help a lot, it doesn't have ANY flexibility. The monoKEY is the most solid but other systems work well also.