RE: T-rex 450 SE vs HDX 450 SE
i have been flying the HDX 450 for 3 years still flies as well as my trex 450 se.
most parts will work on both birds. except the main rotor head, the feathering shaft is a different length. i also have the helimax version of the 450 it also flies about the same as the others. most of the parts from the other 2 also work on this bird. all three have different frames and servo locations, all have 120 degree swashplates i am using a dx6 radio, thinking about trying the new orange 6 channel radio, already have one of the orange receivers.