I started this kit years ago and had a problem with a bad twist in front of the firewall so I put it up and did not touch it for a long time. Just recently got a wild hair and cut the twist off at the firewall. will complete the build this weekend. the only engine I had available was an O.S. la 40. We are going to find out how fast this thing will go. I used micro servos in the wing and on the sides for the rudder and elevator. I fly off grass so I will bring larger wheels to the field.