I don't know anything about putting brakes on a Trainer, or why. I do know of a fairly inexpensive yet effective pumpless smoke set up you can by for $30.00 that does work well with smaller glow engines.
http://www.macspro.com/smokesys.asp
Here's the link of the installation, (note that they have it mounted in an Avistar 40)
http://www.macspro.com/smkinst.asp
Finally here is the link of the smoke system in action. Not too bad really for a $30 smoke system.
http://www.macspro.com/videos.asp
I hope this answers your question for ya. Good Luck.
P.S. If you add this pipe, it is allready drilled & tapped in the right place & ready to accept their pumpless smoke system. You can do it this way with their pipe & smoke system for just under a $80.
http://www.macspro.com/onepiece.asp