I did it once in college in my machining class. Luckily I was partnered with another kid whose dad had a machine shop - or I would have screwed it up royally. Didn't have computers to double check, or do the calculations for us, it was a bugger.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES