3D printing - 8mm sprocket help needed

[limpet]

This is to power the arena pit though so weight is not an issue but accuracy/non-slippage is, I tried using PU drive belt with pulleys but the slightest slip and it threw the lifting mechanism out of alignment. Chain would be fine but I`d have to buy the 4 sprockets I need, also I`d have to modify other parts (printing them would have overcome that).
Timing belt is the way forward for this I think but as a drive system on a bot then rubber belts would be just as good.