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Guest · 10-18-2009, 08:06 PM

There is no comparasin. The 401 is a good gyro, but the 520 is in a completely different class. I have used 401, 611, and 520. I would say the 520 is as good or better than the 611.
Joe

10-18-2009, 08:06 PM	#3
Guest Guest Join Date: Sep 2002 Feedback: 0 / 0% Posts: 0 Total Props: 57	Re: GY520 or GY401 There is no comparasin. The 401 is a good gyro, but the 520 is in a completely different class. I have used 401, 611, and 520. I would say the 520 is as good or better than the 611. Joe