If you're trying to get the control arm on the top of the mount, take a look at what I used:

[link=http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXCLK9]GP scale tailwheel assembly[/link]

Here's a pic of it on my LT-40.

NOTE: this plane has only 4 flights on it (yesterday), but it handled well on the grass runway.

-Jeff