We elected to install an electric trim. This was not part of the kit and a seperate lot of instructions. It took us awhile to get our head around it. After it was installed the first time it was 1/2'' out at one end. This meant the rivets had to drilled out and done again. It took three goes to get it right and a lot of frustration. Apparently it is common and it simply is a matter of persistance. We tested the electric trim on completion with a battery and it worked a treat. Installation now looks very neat.
