I don't have a limitless so I don't have much viable info for you. I did get into speed runs with an infraction but didn't get much over 100 before I lost interest. Just not my thing. Too stressful.
https://www.amainhobbies.com/castle-creations-cobra-8-6s-1-8-scale-brushless-motor-esc-combo-2200kv-cse010-0172-04/p1541544?gad_source=1&gclid=Cj0KCQjw2a6wBhCVARIsABPeH1vH9PSdWSguI6-uDffgFvgQ6CgiqiGISn-clt2DZ7lzlGOjnu5GnAEaAt5rEALw_wcB
I guess they call it gold, looks orange to me.
Did you see the new castle orange cans? I think it's even uglier than the green. All the motors they made for traxxas are black. I wish they woulda stuck with that.
As much as I like Lucas products, I wouldn't use white lithium on diff gears. it's too thin and won't do a very good job of lubricating the ring and pinion. Go with any plastic safe bearing grease.
I can appreciate esthetics so I don't think your 'stupid' for liking the look of the factory...
I'm definitely not saying that traxxas sucks, but their electronics sure do. My sledge and xmaxx are 2 of my favorites but the factory xmaxx electronics are a joke. Did you know the esc on the sledge and xmaxx are the same? Massive size and weight difference but the same esc? Good job...
Speed runs are very challenging. That's why most rc guys don't do it. I tried it some, just not my thing. I did get over the 100mph mark but it was more stressful than fun.