I hope that I did not confuse you on the down thrust issue, that was on another plane. The UCD only required the addition of the 3 degree Ernst plates. There are many posts in this forum and it is difficult and time consuming to read the entire thread. I do not know how many of the posts that you have read. Several other members have gone into detail about coupling issues and the plane wanting to pull towards the canopy or the gear during certain manuevers. Solutions and suggestions are also offered by those members if you choose to take a look at them. There are also some very good pointers on some mods that were done to the aircraft by cumn thru, Lord Lucan and others. I used some of the suggestions offered with my build and they seem worthwhile. FWIW, this is a good thread and offered me a wealth of knowledge. I would hope that it should also help as well.