yes I do... however it takes quite a bit of work to get them close to a XXX-T MF2 or a T4. If you want a race truck get one of those. That being said my Rustler (old style) does pretty well and it has been a lot of fun getting it to work better on the track.
Here's what I've done off the top of my head.... done this over the course of the last year.
Aluminum idler gear
Delrin top gear
New Revo style slipper
Dremel to chassis (see ultimate traxxas website)
turnbuckles for camber links ( I used Associated ones)
Nitro rustler steering blocks/hubs
4Tech rear hubs
Traxxas Big bore shocks
Nitro rustler front wheels
Electric rustler front wheels on rear (I think, I'll have to check for sure)
RPM Nitro rustler arms ( I wouldn't recommend... quite a bit of work to get them to work correctly... but I wanted the BLUE
Others I know have used other arm combinations so I'd wait to see what others say)
Nitro Rustler front shock tower
Upgraded servo... anything is better than the 2018!
Ok biggest problem I have is with ride height/travel. This is mostly because of the RPM arms. Basically because I have no adjustability as far as shock positions. I fight with limiters/oil/springs all the time trying to get it just right and I'm still experimenting. But I have it working pretty well. I'll get to test my new combination in a couple days.
I didn't like the wide front bumper for racing... if you ever nose into anything (even slightly) the wide bumper tended to dig in too much and flip the car. Especially on a well watered track which is what we have.
I'll try and get some pictures posted... everyone calls my truck the Rally Rustler because I run my old touring car bodies on it. Right now its a Dodge Stratus 3.0 Carpet. I have also run a Pontiac G6.