The Adjustment and Tuning of a Circular Polarized feed for 6CM EME

A few years back I did some experimenting on building different styles of 6CM feed tubes for my new 5760 feed assembly.. This is one of the "VE4MA" style I built and had good success with.. Also was a great learning curve.. I am not sure if its THE way to do this but it seems to work pretty good for me...