Hi Rich,
Maybe another 2 cents worth will be of interest.
Know this, the airstream force the rotor sees is of unbelieveable
magnitude,if you saw the rotor tilted back you know what it is.
The force is so great that on a smaller Giro it just tears up normal linkages, that is on the pitch mechanizm. For me 4-40
clevis couplers and .078 push rods crumpled.
Finally 3/32 push rods and 6/32 steel couplers have been safe.
I felt a safer test than flying had to be found, turned out to be
real simple. I attached the Giro in flight attitude to the hood of my car with rubber bands and wire hooks.
Turned out to be a great learning tool as well as saving several
rebuilds. Bottom line is if all works properly on car tunnel it also
will in air,
Flight rotor speed seems to come at about 15 mph, at 20 there
is singing! Be cautious with that big rotor!
Good luck!

Hal deBolt