I bought a new metal bayonet mount for Nikon 18-105mm lens to change for the plastic one, I took plastic one of and put new metal one on, there are 8 screws I screwed the first 7 screws in and the last one will not go in, the last hole on the mount dose not line up with the last hole on the lens, the one on the electric contacts. has any one else had this problem with this ring on the 18-105 lens, it is ment to be for the 18-55 18-135 18-105.