Hi,
I use Master mezon 130 with BEC (but in airplane, Sebart MythoS 125E, F3A plane) and I use the BEC and a Scorpion Backup Guard.
Has worked fine so far.
The BEC do not need to work hard in my plane, according to Jeti Box after flights only max 1 amp has been recorded for BEC, for servos and reciver during about 7 min flight time. I have set the BEC to 6 volt. Scorpion Backup Guard (500 mAh, 2 cell lipo) kicks in if voltage drop below 5 volt on BEC for whatever reason so radio will continue to work (hopefully) if BEC should fail. I have about 50 flights now with this setup.
Backup Guard has it's limitations: 5 volt (one way) output and max 10 amp peak.
38 gram. Red LED flash when the LiPo battery in the Backup Guard is lower then 30% capacity left.
In flight my Mezon 130 ESC get max 45 deg Celsius (summer day at 25 deg Celsius or so outside temp). I get max 78 amp with my motor (Hacker A60-7XS) on 8 cell LiPo (TopFuel 40C 5000 mAh) at full throttle (with Falcon 19x12 V2 electric carbon prop).
Maybe some of this info above can be of help to airplane users, helicopter usage seems to be more demanding on ESC from what I read above in previous posts.
/Bo