Make sure there is at least 15 blocks above for tree growth (preferably 32+).
1) Toggle the deployers so they will place spruce saplings.
2) Re-toggle levers for powered rails so they are all on.
3) Toggle lever on cart assembler and use a wrench to pick up cart contraption.
4) Stand behind and place contraption on controller rail.

Can add chute below portable storage interface to get items out.