This time...half steel, half wood rollercoasters!
I must say I prefer the look of the latter, then again, I didn't feel like I did a good job at building nice looking steel rollercoasters in this one, except for the two dual coasters intertwined with each others... [:
Sucks a bit that there aren't more good wooden rollercoasters. Most of them don't get high excitment ratings no matter how you build them.