Ihave an LT25 that Ibuilt and Icant say Ihavent been less than 100% happy with it. Iused an OS LA .40 in it so that Iwould have enough oomph to pull out of something hairy close to the ground but Iam sure that something less will certainly fly it without any problems. I used a Nickel Metal battery at 1500Mah and standard Hitec servos and even with the reinforcing of the bulkhead in front of the wing and the tailwheel area it still weighs around 5lbs and a few ounces with fuel. Iwould suggest the reinforcements if you have a rough field since mine has survived a few trips into the brambles with nothing more than some popped covering. You are going to be SOhappy with this plane, it's so forgiving and you can land it like a butterfly with sore feet! Good luck on the build but you wont need it, Sig includes a wonderful manual with that build!