The rudder tray and rear former are next. My first trial fit of the rudder tray almost met with dissaster. It is hard to get into position behind the preinstalled former. Once behind there it was obvious that I would not be able to get it into proper position without breaking the fuse sides. It was just as difficult to remove
I made some balsa sticks to measure the width where the front and rear of the former should be. I found the rudder tray to be about 1/4" too wide. A picture shows the red marker lines that it needed to be cut too. After cuting to width it fit where it was supposed to go. There are two 1/4" square (or so) balsa strips that the rudder tray should lie on. One was about 1/8" lower than the other and a small ship had to be placed to level the rudder tray. After adjuting the notches in the preinstalled former a bit it now fit well.

My "light" method of servo mounting to balsa composite structures is instead of gluing a piece of ply below the composite I insert small pieces of yellow nyrod for the screws to go into. The holes for screws are already in the rudder tray and the cutout fits a standard size servo (I am going to use a JR 8411SA). Just open the holes insert the yellow nyrod and wick in some thin CA. Cut flush at the top and you have a light method to hold servo screws.

The other fuse former that goes below the preinstaled one at the rear of the wing openig just required minor sanding to fit into place. Glued in place with slow epoxy and microballoons. (glue is drying) The firewall will be next.