I'm pretty sure my initial marking of the tail cone fitting was done with the tail feathers off. Then at some point they were installed because I do remember doing the drilling for the nutplate screw and rivet holes with the tail feathers on.
Sixth photo in this blog post:
http://www.dogaviation.com/2015/06/p...for-final.html
Beginning with the third photo in this post:
http://www.dogaviation.com/2016/03/c...-resolved.html
Hope that helps .... happy building.