I have my first Z-scale layout planned, and I'd like to include an elevated section. I've read about all the issues regarding keeping grades to scale maximum, i.e. 2%. I'm using Rokuhan sectional track, and have the Woodland Scenics styrofoam grade ramps. My question is how do you actually start the transition from flat to grade? I mean: with sectional track, do I place the start of the ramp directly under one of the track connections? That seems wrong to me... Do I need to use a flex-track section? Or is the grade transition shallow enough (1/2" over 24") that it's more or less a non-issue?