I bought my twinstar when they first came out several years ago. Thunder tiger 42's will allow single engine take offs, I also have differential power that I used to train on engine out practice. The original covering came off several years ago and was recovered with yellow monocote. I agree with increasing the cord on the ailerons by about half an inch, flys much better. Because the landing gear is 90 deg to the wing it's very stiff and will damage the gear blocks on a hard landing, If you bend a new gear wire at about 35 deg towards the tip you'll have a good shock absorber. R Waldo.