Here is a couple of threads that could help you on how to install a Spring Air firewall mount retract unit http://www.rcuniverse.com/forum/m_2827386/tm.htm Tiporare and how you could notch the front of the wing http://www.rcuniverse.com/forum/m_2434444/tm.htm Kwik Fli III. You absolutely need nose gear steering. The Tiporare thread shows the Spring Air steering pretty well.