Damon: Thanks for that info. I guess I will go with the OS 56FS-a being that it is a little shorter and invert it if I have to cut the cowl. I am told it has plenty of power for this plane. I will post some pics when it is done and the Throws I used. I will also use some mixing with the flaps and elevator. I have gone back to the beginning of these threads and read them over again and pick up some great information from you guys. Thanks. I feel this plane will see a lot of flights. It is a Beauty and I hope it will stay that way. Dave...