OK. So I began last November with a fairly simple loop with one switch and a siding just to run my one loco and a handful or cars and now I am getting serious about a micro layout. Have new cars and a small switcher and the layout is coming together. I am looking to do a double loop with one siding and a couple of switches. I had been using Atlas Code 80 snap track and have been reading about flextrak and Code 55. What are the advantages/disadvantages to making the switch from code 80 to code 55 and from snap to flex? I tried searching the Atlas forum but for some reason the search function fails to operate there so any and all comments and suggestions are welcome.