This is a blade pitch gauge for a Furion 50 Flybarred head that includes a flybar clamp. The clamp holds the flybar perpendicular to the main shaft so you don't have to hold it or try and figure out the pitch angle relative to the flybar. The clamp has 1deg resolution angle graduations on both sides. Use a short M4 to bold the pitch pointers into the blade grip and then a M3 x 35 or so screw to hold the two halves of the flybar clamp rigidly to the rotor head and flybar. This was designed for a Furion 50 head, but it might work on others. You will have to try them out yourselves. I printed at 10% and it seems to be enough.