You are correct that the red roof is a booster, you can see it in motion in the Tomica video I linked in the Big Loader thread. Been thinking about getting this, reminds me of the old era of Hot Wheels when the turbo chargers were gas stations and the like instead of generic machinery. Hot Wheels cars may very well work due to the similarity to the Tomica scale.
On a side note it may be possible to expand this, I've seen bigger layouts but I'm not sure if there were track packs or they just bought multiple sets.
Edit: I've looked around a bit and it seams like multiple sets is the only option, this page lists some of the possibilities and the commercial: http://takaratomy.co.jp/products/tomica/.../index.htm
On a side note it may be possible to expand this, I've seen bigger layouts but I'm not sure if there were track packs or they just bought multiple sets.
Edit: I've looked around a bit and it seams like multiple sets is the only option, this page lists some of the possibilities and the commercial: http://takaratomy.co.jp/products/tomica/.../index.htm
![[Image: gRR83EM.png]](http://i.imgur.com/gRR83EM.png)