Thanks James, I purchased a few of the Heng long electronics packages once I found out they need to be functioning for the third party items from Think tank.(if you want to continue to use the Heng Long Transmitter.)
Thomas, with Think Tank,

has been very helpful and fluent in English. I just used email to purchase what I require, as I couldn't navigate the German shopping cart. Thanks Thomas. Could you please also talk about your friend who has developed the IR battling system for Heng Long tanks. There would be a great interest here on this english speaking forum. Many people have purchased Heng long in the past year, and I think there is a huge market for the third party electronics you guys are developing.

Many thanks for your help, and I look forward to installing your electronic modules in my Heng Long tanks.