I've read a couple threads where owners of lifts have had the controls fail ON when the lift is raising. Depending on when that happens it could be really bad. So I updated the controls on my 2-post lift to include a kill switch. _________________________________________________________________ Here was the design I came up with that uses an aluminum enclosure and a paddle switch. Both were found via amazon.com The design replaces the existing hydraulic power unit electric control cover plate and bolts right on in its place. This allows the lift micro switch and the paddle switch to be close together. _________________________________________________________________ And here is the completed retrofit.