What is the difference between the [link=http://www.nitroplanes.com/yak523d5056n.html]Yak 52 3D 50 -56"[/link] and the [link=http://www.nitroplanes.com/yak543d5056n.html]Yak 54 3D 50 -56"[/link]?

The 5.2lbs/616 sq in wingloading sounds like a decent ratio, but a Saito 82 sounds way to big for the aircraft weight. That large of a motor could require a lot of balast weight in the tail of the aircraft further increasing this ratio and decreasing ability to hover...