I made this piece just to test the concept. At first I was going to lay thin strips of brass under the ties in the roadbed and glue it all down. The track is hand laid. The ties are wood. I was concerned about price as well as the brass around curves. I then had the idea of using copper tape. It was flexible so corners should be easy. I wanted several layers thick as I knew that it would be limited by total current capacity. Each nail would penetrate the tape and hopefully make an electrical connection. This is only a 36" long straight. I think there were 2 or 3 that didn't connect electrically. I knew this might happen but hopefully sheer quantity would take care of it.
I've only proven that the concept technically works. I've run an engine back and forth but obviously not under a load over a long distance. I don't know if it's a truly viable technique or not? It might not be a good idea. It was only a proof of concept.
I ran the nails through the ties rather than between them because it was easy. Once the nail head reached the tie, I stopped. Over the length, there is a little height variation so there are some that may potentially never get touched by the slider. If you look straight down the piece from the end you'll see that they aren't perfectly straight. It's tough getting things perfect by hand.
Had the idea been extended to switches, the nails would rise to rail height like my functioning laser cut stud strips did. I'm sure that nails or even screws could be used as that they could be installed between the ties. If a small screw could be used it would make fine tuning the stud height quite simple. A stud need not be used at every tie if the slider shoe is designed properly.
I tried adapting this technique to both Atlas and ME flex track. The plastic ties kept splitting when I'd hammer the nails in.