Thanks for the comments chaps it makes it all worth wile though I’m still not happy with the engine and if a decent one came available I wouldn’t hesitate to change it.

Pete now there is an idea but it would have to wait a while as there are other things in the pipeline

Rex, I’m trying to get to your level of work.

YHR, have a look at the first picture in the thread there are speakers either side of the engine exiting through the large vents, I will take some pictures of the engine next to my 1/16 Tigers to give you an idea of size.