Modifying the P51 Mustang's Retracts. The plethoria of foamies on the market now out number the tradtional balsa ply and many come RTF (ready to fly) or ARF (almost ready to fly) Generally all the components are pre-fitted and all the user needs to supply are a receiver and battery power.
How do they sell them so cheap? By using cheap components, servos, ESC, etc, etc. Also depends on the importer requesting changes to the components, Century UK do. I believe that these large EPO warbirds are made by Starmax and branded to the contract purchaser.
But can we improve them? Of course, but may vary in expense to get the job done right. . For the foamies with due respect, modern blow moulding methods mean models can be produced with excellent scale characteristics and in vast quantities.