One thing that I can say I've learned about putting together ARF's is, when you start getting tired of tinkering with it, drop what you're doing and come back to it later. I know people love building planes, but I don't care for it much, I'd rather just fly them. So I've noticed that when I start getting restless which is usually about an hour of non-stop work, I start rushing things and don't really pay attention to detail. So like I said before, I will work on a ARF and as soon as I get that feeling I just leave the room and watch TV or something. And usually it only takes about 30 minutes or so and I feel refreshed and start taking my time again. My last ARF turned out really nice. I can usually get an ARF together in about 5 days if I have everything I need, thats about 2 hours each day.