Hi guys im new in the world of rc planes but need a little help im getting a Spektrum DX9 and i want to get 1of2 safe technology that you get in the hobbyzone corsair s the first is the e-flite rx safe receiver but im hearing that it does not work in warbirds but others say it does as ive watch a couple of guys on youtube and it looks great or do i go with spektrum ar636f4u safe receiver but going with this 1 i dont get retracts as ive been told by modelflite so is there somebody out there that could HELP