i just soloed with my tower 40 trainer yesterday after putting about six flights on it with a buddy box. the guys at my local flying field have been very helpful. i have an old o.s. 45 on it. it flies very well. my landing wasn't pretty but i didn't bounce and nothing broke. i too thought the instructions were a little vague in places but i got it together and then had the guys at the field check over it. they tweaked a couple things and it was flyable. all i can say is good luck and don't be afraid to ask for help.