Hi,

I'm not using any shims. I found that the SG6042 profile blades spin-up good setting flat on the flexible hub. Other blade profiles that I have tried required shims.

I'm setting the mast angle at 5.5 degrees. I found that to be about minimum. I found that with minimum angle the gyro flies better, less drag, but if reduced more, the gyro struggles to get off the ground.

Phil