RE: gyro red light keep flashing
The rudder subtrim is slid one way or the other off center. When you were flying or adjusting you moved that trim slider in one direction or the other. (its the one directly under the left stick) Center that trim slider and then power up and your gyro should arm. Those rate gyros on the HBK's are very picky about that.
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Of all the things I ever lost....................................... I miss my mind the most!