If you decide to go with a Transducer Shield and Saver setup, they come with instructions and hardware to drill all the way through your jackplate to install their bracket. On the slidemaster 8″, if you do this, it will essentially lock your jackplate in place because now you have a bolt through the fixed and adjustable part on the plate. What I learned from this forum is to drill and tap the hole that will go into the adjustable plate and use a much shorter bolt. On the slidemaster, the black side plate is removable by removing the two bolts holding it on. The other hole thats closest to the transom goes through the fixed part of that jackplate only. This is on the slidemaster. Not sure about the Atlas but I would look at it with a critical eye.