O heck, I have never been keen on the use of NiMh as a RX pack. To many people seem unaware of the limited current drain a NiMh pack can sustain before the terminal voltage will drop below that required for reliable operation, when compared to the humble NiCd battery. I have been witness to models being lost / damaged due to this very reason when “working” the pack hard such as during aero’s. Long live my remaining NiCd’s.