Yes, I run the milled out stock chassis from Hobby Velocity. I feel it's the perfect blend of stiff and flexible. The carbon fiber chassis has a ton of flex which makes it perfect for asphalt, and the stock aluminum chassis is almost too stiff at times. The milled version that HV has is as close to perfect for what I want. It flexes to a point and then stiffens. Hard to really put into words, you'd have to feel it for yourself. I have it on my 17.5 blinky and it's perfect for me.