The template for spacing letters isn’t always waste. We plan on using double sided tape and sticking on the way also. The cutouts like the center of the “D” do drop out but same thing with sticking to wall in correct position.
For people not wanting to spend the money for stud welder you can do layered signs with strong adhesive but lose the appearance off it standing away from backer and ability to remove later. i do want they call gorilla welding very strong but ugly. So when i started to tack bolts to the back i would mess up the face of my signs. i do hope this helps