Hot ESC, But Apms Are Below Rating?

[Gustav]

The frequency thing was just me mumbling on.

The controller being rated for 125 amps doesn't mean it can pull that many amps without getting hot,it means it can pull that many without going smoke.
115 amps is still going to produce a certain amount of heat regardless of the amp rating of the controller as it can't be 100% efficient.The quark has a very low resistance but amps still produce heat regardless of the controller rating,simply the heat needs dissipating.that's how i understand it anyway(could be wrong).

My MGM is rated for 160amps constant and that get's very hot if i run it in grass,even at a conservative gearing.The same gearing on gravel or dirt or tarmac and it's more like 120F after 15 mins compared to 150+F on grass after 5 mins.I suspect the grass was the main problem and yes,at that average amp draw(more relevant than peak probably with regard to heat)it sounds like it will need lots of cooling.