Pre-installed retractable gear. The pattern is nice looking. The only comment is the leading edge of the wing is not manufactured with balsa to make it smooth enough. The ridge of the spar is obvious here.
The battery tray allow easy access for battery change. The old version(not Voodoo) P51 does not have this latch/ battery compartment access ,and have to detach the wing after each flight.
Very light weight. Very manoeverable/ predictable and easy to built. Cheaper than foamy as well!