Thanks for clarifying, Hydro Junkie.

Katsuro, I'm going to suggest you and your friend consider joining a club if there is one close enough to you. Barring that, check out the meetups website or some of the regional forums to try and connect with other RC pilots. Yes, a club will cost money. But there is so much value in having a proper flying site and experienced modelers who can spot problems with your plane, answer questions, show you how to do things right, and challenge you to improve. In 11 years I've spent right around $800 on club dues and another $600 or so on AMA fees. Yes, I could have bought several nice planes for that. But I would have probably wrecked every one of them without the help and collective knowledge of my club. It's the best investment you can possibly make in this hobby.