The cubical quad I built works 
. Today is probably not a good day to test as we have freezing fog in the South of England so a lot of flights cancelled. The weather looks to be the same for the next couple of days 
Anyway, here is the quad.
This is how it compares to my latest CoCo. The quad is pointing SW. Rings are 50nm
https://img2.brain3.photobox.com/93931478f054317d5b3869c507b7e884faf409c0128e1a61e417c432b7e9ed8af1ec3a32.jpg
---------------------CoCo------------------------------------------------Quad
This is my latest CoCo. I stripped the outer and braid from my coax just leaving the core and insulation. Then slipped a piece of copper tubing over the insulation which was carefully cut to 91mm ( my coax has VF 0.66). Then soldered core to tube/tube to core etc.
Note, the quad and the CoCo are in my loft, not outside.