I started working on my HO layout on May 17. The last week of June I had it up and running so when my grandson came to visit he had his first experience of running a railroad with some help. He is 5 years old. The layout is in a room 9' x 19'. I do not have any landscaping done at this time as that will be my winter project. The layout uses DCC (Prodigy Express). Needless to say I worked on this layout afternoons and evenings for about 6 weeks. I am retired!! I now want to add a reversing loop so I can change the direction of my trains. My question is where do I install the insulated rail joiners and where do I wire the auto reverse module? I will be using the MRC Auto Reverse Module. I am attaching a very crude drawing of the area where I want to add the reversing loop. The track that I want to add is in red. I have written some numbers along the tracks so that you can use those as a guide to tell me where I need to install the insulated rail joiners and where I wire the auto reverse module. Thanks for your help.