ORIGINAL: Correy
According to Hobby King their HK450 is 90% compatible with the T-Rex 450......just wondering....what 10% isn't?
I think that might be a copyright statement.. they are 100% compatible..
i have a bunch of them and they are great helis..
Check here.. click on each pic for a flight vid.
http://74.50.85.67/RC/Helis/Helis.html