I have had about 12 planes since getting into this hobby about 5 years ago. My LT 25 build was easy and it flew GREAT and was one of my favorites. It had 3 owners since I had it and still going strong. I had my first engine.... a .40 LA on the nose and it would do almost unlimited vertical!! The LA is not a strong engine but the plane is so light that the LA is a great match. I flattened the wing with no more than 1/2 in total dihedral. Other mods guys gave were good too. As far as the wing tips go....... AND THE FORMERS TOO...... they can be fragile. The formers are BALSA. There is very little lite ply in this kit. (that is why my .40 LA kicked butt). I build "heavy", and still this little jewel came out at only 4.5 lbs!!!![8D]
My advice, 1. Put some gussets and bracing in the wing tips and flatten out the dihedral. 2. I hardened the formers, AFTER installing, with CA. They are very weak since they are balsa. 3. IF you use dowels and bolt-on wing.... be SURE you put PLENTY of added strength on the former where the wing dowel (s) will enter. Lite ply doublers and soak in some CA to the former in general.
I was trying to learn some aerobatics and did not want to sacrifice my 4* 120 if I messed up. This LT 25 helped me try new things. It is not a true aerobatic plane..... but it did a GREAT job helping me learn the basics and it was a lot of fun flying this plane..... lownslo