Nice project Sibot!
Wich motor are you going to put on it? I am interrested by this plane but, all available kits are ARF and as a builder, i would prefer builder mine from a plan or a kit.
In the meantime, here are few Katana's links:

http://www.mcmodelline.com/MCK251E.htm
http://www.giantscaleplanes.com/Katana_80.htm
http://www.aero-works.net/store/detail.aspx?ID=80
Daniel