I think, Audio Sound is irretable .in mechanical video avoid this kind of music. 2. very fast movement. not clear your vidio . 3. . need good diagram and say your plan showing through the diagram. 8:03 8:03 4. What was the defect of the old. switch.and you put the old swich in its position why ? why are you silent in the video..? not get a clear idea with you'r video. 1 hope you will correct it in another video'.