Good Day one and all. My question deals with turnouts. I have been looking for an "understandable" discription of the three types of turnouts. I have seen the #4, #6, and #8. They have also been called, Short radius, Medium radius, and Long radius. All these names leave me lost. I putting together a layout that will have curves that have a radius of both 17" and one at 15". I want to run good sized passenger cars (85' ?- thats another question). What turnouts would work best, or should I say would "look" best. Additionally, I have been told that c 55 track might cause a problem with some American rolling stock because the depth of the rail is too small. What is the best to use? Last question, lenghts of passenger cars. What works and what does not work (look good). Thanks for your help....Harlan