PA14 rear fuselage strengthening

I'm trying to find the location and tube sizes for the rear fuselage strengthening that I have seen and heard of but can't seem to locate it with the search feature. Does anyone have a picture or drawing or explanation that would help? Thanks,

Here are a couple of shots of how I did my 2+2. I tried to copy what I saw on many of the Pa-18. I used 5/8 .035 or .049, not sure of the thickness. The bottom of the side tube is 8 3/4" from the tail wire brace attach fitting. The top of the tube is 14" from the tail spring attach fitting.

Marty

drawings

If you get hold of the gross weight increase from Charlie Center it is very specific on that and other beef ups in the fuselage