I’ve done the throttle EPA thing with many radios & cars, old & new. Always worked great, could always turn it down more than enough. Have an old Magnum Jr. with external knobs that I can pretty much turn unnoticed as I hand it over, very slick.

Surprised it’s not working for you. Perhaps try turning the EPA all the way up, recalibrate your speed control, then try turning it down. Maybe it has a limited adjustment range, and the speedo was already set to the lower side. (assuming you're not confusing EPA with trim)

Duster, you are right directionally, it’s a less than ideal condition for the ESC efficiency and heat wise, but I wouldn’t get too concerned. I mean, we are only letting the noob loose in a large flat area with limited obstacles, right??? Overall load should be fairly reasonable then, with reduced power & speed, any decent ESC should be fine. At least it always has been for me.

Cheers