Pretty much, yes. However, when you go back to my first post and read the added text you'll note that some engines will not let you "trace the backplate". RCGF is one of them, as is 3w, DA, and some others. For those you just need to be either be a little creative with some poster board or be real good at geometry. Hopefully you're real good at geometry

The nice thing about the templates using the long dowels is that no matter what the stand off distance is between the engine and firewall, the prop shaft will be properly centered in the cowl ring if the dowel was centered when you marked the mounting holes on the template. So a little extra time spent making sure the template was accurately made will provide for excellent engine mounting every time.