Rod - Many thanks for the support! I initially found DCS to be counter intuitive and had a heck of a time getting it to work properly (train not on track, can't find engine, limited speed, eg.); the manual was of little or no help and the OGR video which I purchased filled in a lot of those holes. I am now pretty comfortable with it, and as you indicated, experience is the best teacher! And I am now using Fixed In 1 and Fixed In 2 for my loops and am powering the TIU with a small power supply. Everything seems to be working well!
Thanks again!
Firsttimer