I'm sorry to hear you had a bad experience with Knox Hobbies, armody.

I've mentioned in other threads that you can buy JBA engines through http://www.kangkeusa.com as well as http://www.bj-model-engines.com/home.html

In any event, you'll love your Magnum XLS .46A. It's a terrific 2-stroke. Hopefully you'll start a project at another time that will give you an excuse to try a JBA engine in the future.