My dad has a kicker motor as an emergency backup for his big boat. Set the kicker straight and steer with the big motor. We did this for 17 miles when the big motor spun a prop hub. FYI, a 15 hp. Johnnyrude will push a 20 ft. center console for 17 miles on a six gallon tank if you need it to.

I don't have any experience with the removable plates for auxiliary motors, but it seems to be a good idea.