Hi fella.
I'm building a 550 too - but it's taking time as it costs too much !
I've got the Sunnysky motors on mine - 2122 980KV I think. From bang good.com.
Motors are superb, lovely and smooth - highly recommended.
Also - putting a Tarot Gimbal on mine with Aeroxcraft landing gear.
DJI Naza lite on this one too - for safety when funds permit!
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