RE: Rust
The part your refering to is called the crankshaft, just take a scotchbrite pad and clean off the rust, clean everything out and then lube it with wd 40. I find if you use wd-40 instead of after run oil you will never have this problem.
savage ss
.26 t maxx
nitro evader
ntc3
XXT
RC iS a siCKNess thAT caN'T bE cuREd