Sorry to butt into a durango area but i'm suprised you are struggling with the RS Pro... Thats a top level ESC, I'm not sure anyone has ever comented on my car looking sluggish.
If you are running for 10 mins it might be worth getting a fan on there but as others have said that will get any speedo hot. Are you running the latest firmware and what settings are you using?
PM me if you need a setup... I wouldn't give up on it and spend money on something else just yet.
Kev
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