Well I am glad you remember my build David. My Tipo keeps on Flying Strong. Here is a picture of it at Markham Park in Weston FL. I finally understood the whole idea. I'm interested more in the Illusion this time rather than the Tipo. However I was also interested in a YS rear exhaust. If I go with this set up, installing the pipe on the side of the fuse, would I have to do any other type of modification?. I believe you mentioned something somewhere about changing the anhedral of the stab depending on the power setup. Am I correct?. If not YS I would go with a OS61AX with pipe under the wing.