Afraid it isn't possible and it's stated in more detail in the manual IIRC.
It has something to do with servo synchronization.
BTW There is a support forum here for Weatronic > [link=http://www.rcuniverse.com/forum/forumid_482/tt.htm]http://www.rcuniverse.com/forum/forumid_482/tt.htm[/link]