Hi there is a well known designer and maker of large scale aerobatic kits in North Wales called Alan Hawes.He does extras caps and edge 540t s at 33% and 42% scale.The edge 540T 33% retails with prebuilt wings for £395 and the best engine by far for it is the ZDZ80.The average all up weight is about 25 pounds.Look for his adverts in the magasines RcmodelWorld and RCMand E