Thanks! Still plastic centers in mine.
I was looking at the metal lockers and aluminum axles, but priced it out to about $90 to replace all the main plastic components with metal, which I'm not opposed to, but I just built it so I'll run it and let breakage determine what gets upgraded first...
I'm primarily a fan of nitros, particularly HSP's models, and regularly buy replacement parts from aliexpress, which is why I noticed their 1:10 crawler being sold as a roller kit for $90. I had extra servos, a brushed 35T motor & ESC, generic truck body, and basic receiver / transmitter...