Hello Goplaneman!

Welcome to the hobby!!! Check out this thread:

[link=http://www.rcuniverse.com/forum/m_1093079/mpage_1/key_/anchor/tm.htm#1093079]RCU Gap Sealing[/link]

In general, sealing the gap makes a huge difference. Like one of the guys in our club put it: "it's like adding power steering to your car". Of course, "the product" of the gap is that your plane will become more "sensitive" to controls input.

Good luck!