JuiceGoose
I 3rd and agree with the advice given. I am on my 3rd ucd, two are still in the air after years. One died from dumb thumb. Never heard of a wing blowing up. When you take covering off a structure, drag out your soldering iron and run it down the area you want to remove with a metal ruler and pull off. Unless you have a light toutch, you will cut the balsa with a #11 blade and end up with failure. Think this is what happended to you in this case. You can build a new stab yourself useing some care to trace out both sides and adjust for the center section as needed, or buy new from GP or Tower. Cut out the old with care. The advice that you should not be flying over 1/2 throttle is very good. 3d machines are designed as floaters and need to be flown this way to get the best out of them and yourself. You will find the 60 size ucd is a much better flyer than the 40, I suspect its a matter of wing loading. Anything more than a 70 in the ucd 40 is a might much, I fly with a ys 63 and hover with a little over 1/2 throttle. My 60 yas a 110 in it and it hovers less than 1/2 throttle. Keep them as light as you can and they will generally fly better 3d for you. ENJOY