RE: Which T-REX?? Too many different ones????
I agree with Ultraviolet until you get passed basic forward flight(FF). My Trex XL HDE would not track properly, it always wanted to climb upright and inverted and it was quite sloppy. Then I found plastic parts breaking/cracking in flight. After going to a full metal head all the slop is gone, no parts are breaking and tracking is very nice.
I am not into bling at all. All I want is good flight performance. Form follows function for me hands down. I had almost $10k in my 78 Bronco and the body still looked like crap, but it would go anywhere anytime in any weather. Hehehe 48" of snow was nothing at all.