Imagine most of us like to save our goodies from previous bikes to put on our new rides. Just a heads up that the chrome derby cover screws from previous twin cam models will not fit the new '07 engines. Luckily I checked the part numbers before attempting to exchange them or I might have screwed up badly. Even had the parts guy verify it. He was surprised and did not know (a very experienced guy). Cover itself is also different part number even though it looks the same. When I took the cover off at my first fluid change to add the primary oil I compared the screws. '07s where considerable larger & longer.