Hi there Erfolg, how are you. I am also looking to convert a guillows kit ,any around 30" wingspan,probably the Stuka !!. Anyway all the inspiration you need and advice can be found on this amazing website ; www.ffscale.co.uk This is where some of the best flying model builders in the world strut there stuff at the uk indoor nationals.It is freeflight but don,t be fooled by that ,these tiny models starting at 4" wingspan ! take off fly true and land better than the real thing,and the detail ,build quality has to be seen ,check out the albatros dv at the 2008 nats menu.Trust me you will be in awe of these builders. Hope it helps Ian .