Hello, all. I am ready to immerse myself in my first model railroad since the '70's. I have been reading quite a bit about DCC, so I have purchased an NCE Powerhouse Pro and an additional throttle. I will go with the Atlas Code 83 Flex Track and Peco small radius turnouts. All but one of the turnouts will be manually operated. The rail will sit atop cork roadbed. The layout will have two mainline loops, a reverse loop and two sidings with bumpers. There will be two places on the layout where crossovers will be used. With all of that being said: 1. Do I need to use plastic rail joiners at any point in the layout? What are these plastic rail joiners for? Specifically, where are they placed? On which rail are they inserted? 2.I will need an auto reverser for the reverse loop, correct? 3.How many feeders are required around the layout? Is there a formula, i.e., every four feet, or do they go before and after each turnout, crossover, etc.? 4. The entire railroad will sit on top of 3/4" plywood. I have read a number of posts on the forums where people are actually covering the entire table with a sheet of foam, or they are using MDF instead of Plywood. Why? Can cork roadbed be nailed through the foam to the table, or is it better to glue the roadbed to the foam?