Hi Horrace, Thank you for that great reply. Seeing that T-6 in front of you has really got me inspired. It's just the way I remember it. I can't wait to get started. Now that you mentioned it, I do remember having one of those black and red Olsohn and Rice 23's. Maybe that is what I used. I will probably go with an OS .25LA. There are very few contol line engines to pick from. The ball bearing ones are running too heavy. I did have the OS in a modern day Barnstormer that gave me marginal performance but it was good enough for me since I can barely fly U/C now and going around in circles on an ounce and a half of fuel was just about all I could take. I'll post some images of the build as soon as I get started. Maybe some more old control line guys will get inspred. Thanks again, Dan.