A view from the bottom shows a ply plate and 

Golden Era Model Service
High Quality Plan Sets for Radio Control Aircraft
The Tlush Mite

Published in the May 1938 Air Trails
Designed by Francis Tlush
Original span 50 inches

A j-bolt is made from a 2-56 control rod end and fitted into the fin lower rib.  A companion hole in the stabilizer allows it to pass through.  
There is a hole in the 3/16 balsa fin base plate in the fuselage to clear the nut and washer that retain the fin to the stabilizer.  A 2-56 allen
head cap screw in the front of the stabilizer retains the front of the tail assembly to the fuselage.  The front of the stabilizer rear
spar must be filed to allow the aft fin spar to clear.

A detail of the servo installation.  Spacers were required to get vertical separation between the servo arm and case.

Part of the plans for the Tlush Mite 72

The landing gear is retained with .032 safety wire here.

A detail of the rudder control arms and the elevator join.  A 1/8" carbon fiber rod joins the elevator halves, and runs through an aluminum tube in the center.  The aluminum
tube is glued only to the stablizer rear spar if the tail is removable, not to the trapezoidal fixed section beteween the elevators or to the fuselage. The outer elevator hinges
    are wire pins inserted through the stabilizer tips.  The pins and the carbon fiber rod must all line up for friction free elevator travel.  The rudder control arms are made
 from FR10/GR4 circuit board material and is one piece, inserted through the rudder and CA'd in place after covering.   The control strings are Kevlar thread, 30 or 60 pound
 test.  Internet thread stores have it, get the bonded thread.  https://thethreadexchange.com/  Multiple half hitch knots were used, secured with a drop of CA.

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