Based on my original Assembly-Workers deck, here's the Modern version:
Assembly-Workers (Modern)
Tolarian Vault
Other Lands
Approximate Total Cost:
Same strategy: produce tons of mana to turn Urza's Factory into a viable creature producer. Cast a kicked Rite of Replication on an animated Mishra's Factory and you can alpha-strike with the workers you already have, pumping them with your land-tokens.
It's just as fun as the original.