I hope I can make this clear. My 1970 sportsback restoration is nearing completion. I am running into a problem installing my new door handles. Is there a trick to it. Can they be installed without taking the buttom mechanism apart. It is almost impossible to attach the small screw holding the spring mechanism in place while working in such a tight place. Anyone who has installed them will know what I mean. I guess my main question is can the whole mechanism be installed without being separated?