I started a new thread in the Tips & Tricks forum that is intended as a comprehensive tutorial on how to avoid or trouble shoot derailment problems on your model railroad. It is pretty much basic stuff, and it is a long read because the intention was to make it comprehensive. If anyone hasn't taken the time to read through it, if you could read it and then post anything I forgot to put in it. There are a couple of reply's already with other suggestions, that I went back to my original posts and incorporated with the edit function. We get a lot of posts from people having derailment problems and I would like this thread to cover every cause of derailments and tell folks how to find the problems and fix them.