Hi,
I want to give a background on my experience first. My father created a pretty large collection of Lionel o27 that he expanded as I was a child. When I was a kid we just knew how to assemble the trains and we ran them hard. 20 years later I am opening it up to see if the engines and accessories work and going to try do some tuning up.
I cleaned and sanded the older tracks. I also bought some new o27 42 radius curves and o27 switches
I did a layout with an outside and inside loop that connect to each other at 4 different points. I am planning on expanding the insde of the inner circle into a train yard, except I ran into an issue. When I have the inside and outside loop connected to each other at the switches(I tried all four switches together or one set individually) the locomotives will not run through the switches when changing loops nor the inside loop can power the locomotive. My work around I got was to have black plastic pins between the switches and use the secondary output line on the transformer to power the inside loop.
If anyone has insight into what I can do to correct the issue much would be appreciated. I'll attach some pictures of my progress already.