I found a link to the manufacturer's site in the UK. I don't know if this is where Tumbler got his from or not.
http://www.ytinternational.co.uk/main.htm
Also found another thread concerning the Rush here on RCU.
http://www.rcuniverse.com/forum/Free...1774991/tm.htm
Hope this helps.
By the way, those are some Mad Skillz ya got Tumbler.
Shooter