Heard something that traxxas rear sway needs some minor modding to get working properly.
Only on the Nitro Revo.
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)
Ya, I did have a little issue with them hitting the top rear plate. Its not to hard to fix. I havent tried the tekno ones so I cant speak for them, but I do like the traxxas ones.
Good luck on the rebuild crazyjr, I cant wait to see the progress.