Alfredbmor:
I wanted to add that the set up in my post #53 was just a way of servo placement which worked well for that plane,and could possibly be used for the cap provided you relocate throttle servo. Not to take away from your idea.
I also had already built in the guide tubes for the elevator throw rods.

Your rear mounted servo idea is a great! one. It is used frequently on giant scale planes because of the advantage of short linkages.
Im still debating which technique to use.
Im using an O.S. 46 fx engine so i guess if i do dry run balance check same as you did, that will probably let me know which will work better.

I cant wait to see your wing covering!