That looks quite fun, especially for kids. And, looking at the video, it seems to work very well too. Nice work! 
I'm going to try it later today.
Btw, you can post a topic here (on Eurobricks) too, quite a few people that might be interested in this probaby don't read the LDraw forums.
I'm going to try it later today.
Btw, you can post a topic here (on Eurobricks) too, quite a few people that might be interested in this probaby don't read the LDraw forums.