Steve,
Attached is a picture of the inside of my Tiger's turret. I just attached the servo to the metal cross-brace with silicone (Goop).
He is a link to a H.E.A.T. Club forum that explains how to get it all to work with the Tamiya system.
http://heatarmor.com/joomla/index.ph...d=92&Itemid=29
They used the ratcheted stick for the main gun. I prefer the stock config for that being the throttle. If you are not using a ratcheted stick, you will need a Camera Position Controller (CPC) so the gun will not center itself every time you let go of the stick. Available from Dionysus
http://www.dionysusdesign.com/produc...a7d9f816d41d6d
alternative - having trouble logging onto Dionysus Designs
http://www.rcdude.com/servlet/the-16...ller-V2/Detail