In my [link=http://www.rcuniverse.com/forum/m_3439708/tm.htm]Pay It Forward build thread!! LT-40 build [/link] thread I addressed sealing gaps in the thread. You can find the sections in the build by following these links.

Aileron gap sealing starts here:
[link]http://www.rcuniverse.com/forum/fb.asp?m=5398504[/link]

Rudder/Elevator sealing starts here
[link]http://www.rcuniverse.com/forum/fb.asp?m=5589251[/link]

Ken