Finding the stuff in stock is a matter of timing. When Steve from Speedtech comes here to tell us that he has stuff back in stock...GO THERE IMMEDIATELY!!! Cause the stuff goes fast!
As for the hop ups. I maintain that there aren't any "need" items other than a spring assortment. But if your looking to buy some...
this is at the top, because its a must have for tuning any TC set up and its the only "must have" on my list.
for me, this was mainly for the threaded bodies. If the stock plastic shocks were threaded, I wouldn't have upgraded.
-Sway bar set:
I like my cars with sway bars when racing outdoors. When racing indoors on carpet, the front sway bars really help take away some of the massive front traction the car has.
Whether you go with anodized aluminum, stainless steel, or Ti screws, its just nicer to work on the car with hex hardware. And it saves a good bit of weight as well.
I would start with those items, then if your still looking to pimp your ride some more...
Lets face it, the stock turnbuckles suck. The adjustment nut is too small and strips to easily. Remember...stick with Tamiya Ti items if TCS is in your future.
-One ways (front and/or center):
this is a preference thing. On carpet, I can't imagine wanting more steering from this car, so I'm holding off on the one ways. For outdoors, I'll likely get a one-way just because I also run one on my nitro car and I don't like to run a one-way in one car and not the other.
They don't flex as much as the stock units. And they add an extra tuning hole. Other than that, thats it. They don't save much weight over the stock ones though...
Thats how I have/would approach the hop up purchases. It leaves you with a slightly lighter, but still close to stock handling car.