I built and trained on a GP PT60. 71 inch wing span. It looked comparable to the sig kadet arf, however it has proven to be considerably more durable. Darn soccer club has a shed on both sides of our clubs paved runway. Cliped the wing once and bounced off the top of the shed. A friend said his senoirita would have been in tiny pieces after a hit like that. It flew really nice, slow when needed and fast enough when things got boring. Dead sticks were easy because of it's ability to glide. Some say light is best, but it sucks when the wind pushes the plane around like crazy. I planned on crashing when beginning my training, and wanted durablity. Was past the training stage when I crashed the PT60. There are alot of trainers out there that are good.