Hi folks, I need some help re. making an N scale layout into HO. I found a 1995 MR magazine that has a very interesting Nn3 layout that is 18"x36". I am trying to determine what the ratio would be to convert it to HO. I know you can't double it. The layout is a mining scene which has a 6%max grade. What can climb that or would I have to somehow tame that down? If there is interest I will try to photograph it and post or if anyone has some old MR mags it is in the 1995 Great Model RR special edition. Thanks, Paul