Currently building the agrssor 240 from TopModel / Bichler.

http://www.topmodelcz.cz/letadla/agg...ggressor_a.htm
http://www.topmodel.fr/product_detai...e70d8a&id=4113
http://www.modellbau-bichler.de/date...67&uebertrag=1

The manufacturer gives a COG of 270mm from the leading edge. Root is 575mm and tip is 380 mm.
When the geometry if the wing is fed to a programm this results in a COG at 41%

To my feeling this distance of 41% can not be right. A value of 30%, 215mm from leading edge would me more close to my feeling.
The Middel of the wing-joiner-pipe is also at 30% / 215mm.
A Mail to the manufacturer also confirms this value of 270mm

Can this value be used as a starting point?
The wingsection is NACA 64A014. This section has the highest point relative far to the rear. Is this section known for the 'rear' placed COG's?