Don’t have any pics available right now but I have a pair of Lake Masters on the 16′ Tracker. THe LM’s have a bolt on mounting plate I put on the gunnels that allows you to remove the downrigger when you do not need it.
The Other option I seriously considered was the 2 x 6 plank across the stern but this option worked out to be cleaner for my rig.
Units are manual, not terribly expensive but work just fine for what I do an how much I get to fish