i got my bench work here, now this weekend im going to get foam for the base. how think should i get? 1", 2", 1/2" whats the best and why? how high of an incline will i need to clear an N-scale train safley? im looking at the woodland scenics inclines, it says it comes in 2,3, and 4 % grade inclines. one piece of 2 % incline will lift the track up 1/2 an inch, one 3 % will go up 3/4 " and 4 % 1", am i right so far? so if they are 24 " long and lift the track at a 2% grade, i would need 6 24" pieces , and 12 feet of room to get to 3", then 12 feet of room to come back down. am i still on the right track here? ok, now do you think its ok to use the 4%, ? if i have to make the incline on a wide sweeping curve? see im waning to make a mountan, but have the train in the middle, have a wall on one side and a cliff on the other, but i dont see how i can do it on a 4 X 8 table one thing i thought of was to have all the track up higher, so i would not have to go up as high to het to the mountan, but have the "gound" go down hill to table hight at the foot of the mountan. to give the effect that its higher then it is.