Ive heard of people receiving kits with no thread on the screw. Check it for length against the manual too and start again from scratch, could be something as simple as like Dan said, we've all done it as being familiar with the thing we can don't pay much attention to the instructions (I don't anyway). Ive forgotten the spring once and lost my ears, then the whole thing turns in the outdrive and become a right swine to take apart again.
