XXL indoor rc Boeing 777 - Crash and first flights with retracts!

My first Boeing 777-200 flight with retracts ended in a crash! Retracts worked great and ROG take-offs are great. Lands very slow and gentle! The 2 meter wingspan model is scratch built from 1mm depron sheets, and now weights in at 590 grams in total. Cause of the crash was not enough authority due to inhibiting differential thrust - pilot error