The Tinker Factory. Part 2

Synopsis
The construction of the metal working plant is going at full blast. However, I should not forget about my garden beds.

Objectives

 * Build the first stage of the Tinker factory.
 * Build the second stage of the Tinker factory.
 * Work in the garden and harvest marrows. 0/30

Completion
The construction of the tinker factory is almost complete. I have to break one last barrier.