Folks I need some help with a few polarity issues I have going on with regards to crossings. I have put a couple of pictures of the layout up in the files section
Files->Bob P's layout
Both levels of my layout have crossings the lower has 2 and I can not seem to keep the polarity correct. The lower level is built and the track is laid, the upper level as been started. I didn't see the shorting problems until I was trying to configure my Switch-8's and Switch-It. I know that I have put put some isolaters in but I'm not sure where.
Any help you could give me will be a big help!