dkf1979 - Thanks for responding to my question, but I had already read through that thread. From what I can see, mounting the engine upright would look pretty ugly and you are right about having to cut the cowl up quite a bit. It just bugs me that tower indicates you can mount the engine upright. I just can't see an extra, edge, or other aerobatic planes with the cylinder head sticking up through the cowl. What were they thinking[X(]