It's quoted as 15 to 35 percent of the mac...which I believe is 41 inches for the stock kr2...less for the kr2s. The point I make is that the location of the mac is very easy to change in relation to the stub wing...the as5048 has spar locations that move the mac...and cg range forward about a half an inch.
https://sites.google.com/site/mykr2stretch/ https://sites.google.com/site/mykr2stretch/parts-for-sale
