I will try and be as breif as possible. Problem - I have a 8x4 layout, ho scale, double oval with auto left and right switches connecting the ovals . So you can switch between the ovals from either direction. I am currnetly using the mrc railpower 1300 to power the layout. I just bought a tech4 280 dual control power pack. Here is my problem/question. I want to run 2 trains or more seperately,and be able to run them in opposite directions as well. I have some knowledge of using plastice rail joiners to seperate the 2 ovals. To create a seperate block for each oval. I also have to kids and I would like to let each of them control a train. And I would prefer to keep the kids apart to avoid any altercations . Could I simply hook the tech 280 to the inner oval and the railpower 1300 to the outer oval with the plastic rail joiners seperating the 2 ovals? And if so what would happen if they somehow have the trains end up on the same oval at the same time? This whole shorting out stuff is where I am concerned. I know just enough about this stuff to be dangerous..... Let me know if anyone thinks I can do this or if a better way is possible. I am just still trying to keep it as simple as I can. Thanks!!!!!