Kato SD40-2 mid Canadian National #6256 posing for the camera. The hole directly to the right of the other loco is where the auto reverse module lives.

Great Idea for the reverse loop module, I have 2 on my HO layout. After seeing how you planned your module placement; I thought of erecting a substation structure over the hole. By the way i'm glad to see you using foam insulation board. I use 2'' on mine its great to work with.

Thanks you. Insulation foam boards strength to weight ratio can't be beat.