gtoby001

I made a twin red gear setup and the air is blown in between them then slowed down with a ratio of 560:1! Works like a charm (needs a wider tube though)

Ive only got an old grey one, but it does the job nicely!

As I started out with lego trains in 2008, when the RC trains came out, I have both 7897 and 7898. I wanted the 9v ones but i thought that they would have been dangerous because I have a dog. Then, in 2010, I stopped lego until 2014. I got the 7948 train and I have made a custom 9v battery holder that works for pf. I prefer PF now as it also gives you better traction from the weight of the batteries. PF it is!