0
It depends on who you know, and what you want to do.
If you're just going to hoon around, get some 5200 and screws and run them in at least a week before you intend to ride them so they can cure. Use short screws that won't penetrate the carcass, and once that stuff cures, I can assure you, you won't spit a screw without spitting the whole knob too. Certain races require certain studs, and not screws, but I'm not reading that's your intent.