Hey guys I'm just looking for any insight on the electronics on these big cars. I never had to change servos or batteries on my nitros but I also didn't run them as hard as u run my xsc. I'm an elevator mechanic in the electrician union in new York, so I'm aware of how electric works just not on a small scale. I looked into the hitec 645 throttle servo And i have a killer bee installed. Just curious on what other servos should be purchased? Change the batteries? And if so to what kind? Any links posted and opinions are appreciated. Thanks