I use delta angle hinges (15 degrees) and that takes care of the incidence. Blades mounted flat, I have used Clark Y and all is OK. Except yesterday I had a crash! Nothing to do with the rotors (but I did break one). Dark day, rain about, fresh breeze, plane got too far away, oriention difficult - Bump!! However not complete disaster as autogyros generally don`t hit too hard due to slow flight characteristics and repairs underway.
Colin