Tube is 1 7/8" with the body tied to 3/4", overall fly length is 4 1/2", used the liner tube from Veniard Scandi tubing to keep it slim and will prbably just tie a large knot on the double hook and fit the knot into the end of the tube to secure it.
Would be nice to be in a place with sufficient salmon visble to put some of the theories to the test to see just how many of them actually hold true. I usually do quite well at this time of year on Red Allys or cascade variants where the orange is substituted for red but could not possibly know if the same fish would have taken a standard Allys or Cascade.
Cheers
Ben