Whenever you crank Hard Hat Area, roll two six-sided dice. Hard Hat Area assembles a number of Contraptions equal to the difference between those results. (To assemble a Contraption, put the top card of your Contraption deck face up onto one of your sprockets.)
Whenever you crank Neural Network, gain control of target creature an opponent controls with power less than or equal to the number of creature cards in its controller's graveyard until end of turn. Untap that creature. It gains haste until end of turn.
Whenever you crank Optical Optimizer, until end of turn, target creature becomes an artifact in addition to its other types and gains "{T}: Draw a card."
Whenever you crank Record Store, look at the top X cards of your library, where X is the number of artifacts you control. Put one of those cards into your hand and the rest on the bottom of your library in a random order.
Whenever you crank Thud-for-Duds, roll two six-sided dice. Thud-for-Duds deals damage to target creature equal to the difference between those results.