Back in 2023 I discussed my experiments with the Azatrax automatic point to point circuit in THIS POST. At that time I was using the Hot Springs module as one end with it's pair of station tracks being a fork at one end. The IR sensors were mounted in the track. The other end was a single track with the IR sensors being mounted on a portable bracket made of brass that could be mounted on whatever module was at the other end. While I had this working OK in the shop, I could not get it working at a show and put the idea aside.
Recently, I got interested in trying this again. I believe that the main problem with the failed setup was the instability of the portable sensor. This time I used a narrow 8-foot-long piece of 3/4 inch plywood with the sensors mounted on blocks of wood. I was able to get it working with 3 trains rotating around a double fork configuration. This setup ran reliably for hours at a time.
So with this new success, I plan to build another module that will be the end opposite the Hot Springs module with any number of modules in between up to 30 feet. That modules sensors will be securely mounted in the module. I have made up a new 30 foot long cable and tested it with this temporary setup. I've also added a control that will allow adjustment of the station stop time.
When this new module is ready, the next step will be to install the track, turnout, and electrical so this can be tested again in an actual layout.