i am just in the planning stages of my layout. i have an area 3' x 9' against a wall. there is absolutly no extra room to get more than 36" out from the wall. i will be doing ho. my question is what is everyone's experience with small radius? i will be doing a main loop around the outside which will have 15" radius. it will be a GP40 engine with some smaller tanks, hoppers, and caboose. have tested this with no problems. as for the inner track, i want to set up a coal mining track, but it will need to have 12" raduis to fit. i have a 0-6-0 steam engine and 3 atlas 2-bay hoppers (pretty short). anyone have any idea if this will run smooth? not concerned with speed, as it will run slow, just don't want to run into any problems once the track is laid. thanks! these forums are great!