Hi all, I've been experimenting with some of the premade foam inclines and have found that even at the shallowest grade available (2%), most of my steam locos aren't able to pull more than a couple of cars up the grade. I don't have the straight line space available for a 1% grade, but a helix could be an option. My question is, is a 1% helix viable, and/or will a curved 1% grade end up with similar performance to a straight 2% grade? The layout I'm building will have 2 or 3 levels, getting trains from level to level would be a nice bonus but not a deal breaker if it won't work with my rolling stock - I can simply keep the levels separate. Thanks for any insight.