I've never actually broken a Tanko arm or an inner hinge pin and I race three Teknos every weekend. If on a budget, just buy the kit and metal servo horn and you are are set for a while. If you like to be prepared no matter what, then yea arms, shock shafts, camber links and hinge pins are nice but I've never really broken any of those things or any plastic other than the rear diff case on the EB when I didn't run the rear brace, I'd recommend an extra set of front/rear shafts and if you want the only hop ups that don't come in the kit then you can get the aluminum center drive shafts which are a good upgrade. Clutch shoes are a good wear item and always nice to have. otherwise, honestly unless you are new to RC and will be doing ALOT of VIOLENT like first time ever driving anything RC crashing, then the NB48 doesn't need a ton of parts, haha. it's all in the box except the servo horn. LRC block is nice for some situations but by no means a necessity if on a budget. I would also recommend the new 10 degree offset brake cams and redesigned droop screws, I don't think these have been added to the kits but this will help the brakes a lot. Feel free to message me if you have any specific questions about the kit or build or set ups, happy to help.