This kit contains 3 sets of lead screw Z drives with 3 Wobble Wafers to eliminate possible Z-bandings.
A 6+ driver slot control board for XYZZZE is recommended, but if you mechanically connect the 2 left-side bed supports with an aluminum extrusion, and power 2 steppers with 1 driver module, a 5 slot control board is still applicable.
Two options, partial and full, are provided as the emergency surcharge of international shipping is high after COVID. With the partial kit you'll need to prepare 3 lead screws and 3 steppers. With the full kit, it's assumed that you already have one 1.8° Z stepper and two linear guides in your SK-Go 1 or 2.