Take a look at these threads:
http://www.rcuniverse.com/forum/m_5775064/tm.htm
and
http://www.rcuniverse.com/forum/m_6854688/tm.htm

I've not used them, so I can't offer a personal experience.

Searching the BBB database also turns up this:
http://www.labbb.org/BBBWeb/Forms/Bu...nyID=100056369

Hope this helps.