Hi MicroMike , Im with you on the higher specs used for repairs . I have mine back , repaired by aussie guy . Going of beter parts installed /quality of repairs . In long run i think works out better value .I canreportfindings over next few months as i try/install them . First of should be mates Walkera 53# and my Twister Medevac both run 7.4vt . i blew Twisters 4in1 fault finding mates 53#. Twas faulty engine .ouch ..It great to have guys like you around who can rebuild with better components . Russell