What are the differences between the extra 300 and extra 260 50cc planes? Im looking to get into IMAC and 3D flying and Im just wondering what the physical, structural, and aerodynamic differences? What are the flying advantages between the two planes? Im having trouble wording this question to where i get the answer im looking for...... i guess what im really asking is why is one an extra 300 and one is an extra 260? Also what is the difference between the letters following the numbers (ex: L, LP, ect......)