React is the second of Nubnubbud's automatically-adjusting drivers, it can both spin freely on its tip and grip the tornado ridge, and spends almost no time getting to the center once it begins gripping the arena!

Extra parts needed:
2x M2x8 machine screws
2x M2x8 bolts
1x spring (12 to 13.8mm diameter, 12-15mm height, fewer coils are better, must compress to below 3.5mm)
NOTE: Untested! while we know this part works as intended straight out of our in-house prototype printer, we have not gotten the test piece delivered yet! if you get it early, feel free to use the contact us form on the FAQ page to tell us how it went. if something went wrong, we'll do our best to correct the issue!

Get the parts here:

burst spring