For a .40 trainer 45" wingspan is really small. The smallest im aware of is the tower 40 trainer which is 55". Ive heard good things about this one. If you want to go smaller youll probably have to go with a .25 engine which then you can get a numerous airplaen wiht small wingspans. Or if you want you can go eletric. I can understand why you would want a smaller airplane then the big LT-40 but they do fly alot better and are alot easier to see and train on. You can get really good 60" trainers that will do the job as well. Most .40 size trainers will have airelons or give you the option of putting them in.