Hi
The RS was rated at 5 turn limit this time last year? Looks like it's been re-rated. I've been running a Tekin RS and a Tekin 6'5 in a DEX410 on a 22 pinion with no probs. I have cut the two cooling vents on the body and opened the back of body a bit to get some air flow. I have also mounted the heat sink side of the ESC and cap' next to the spur gear as the spur moves a lot of air when spinning and gives a lot of 'free' cooling. I don't have a HotWire so have been running standard settings from a year ago, they may be more agressive now? I've only thermaled mine once after about 12 mins mid summer. Dont swap anything on car and try again, when (or before) it stops check the onboard LED's on ESC and this will tell you if your ESC is (or is near) thermaling. From what I've read the Tekin's BEC can struggle to supply enough current for a high torque servo like yours but this should show as a quick cutout then the car would be good to go after a couple of seconds. Most people fit a capacitor to the receiver to fix this. If yours is taking 30 seconds to go again sounds like thermaling.
HTH. HNY
